Existe um mundo de diferença entre um indivíduo não treinado pela Força que comete um assassinato (o que geralmente não requer o uso da Força) e um Sith Lord totalmente treinado executando proezas impressionantes como emitir raios ou enganar a morte. Da mesma forma, no lado da luz - um Anakin Skywalker destreinado pode ser capaz de reagir com rapidez suficiente para pilotar um pod-racer, mas isso não é a mesma coisa que a Yoda levantando um X-Wing com a Força.
Qualquer "diluição" do lado negro causada por um indivíduo não treinado e sensível à Força cometendo um assassinato seria tão pequena a ponto de ser inconseqüente. Tal indivíduo não é páreo para o poder de um Lorde Sith. . Considere, por exemplo, Hetton : um homem que coletou artefatos e documentos Sith para ensinar a si mesmo os caminhos do lado sombrio de a Força (ele poderia até conjurar alguns Relâmpagos da Força), mas que não recebeu qualquer treinamento formal de um Sith e, consequentemente, provou ser contra um Sith Lord treinado. Hetton se comprometeu a Darth Zannah (o aprendiz do reinante Darth Bane) e Zannah ordenou que ele a ajudasse a derrotar Darth Bane para que Zannah pudesse se tornar o novo Lorde das Trevas dos Sith. Na verdade, Zannah apenas o preparara para ser morto por Darth Bane, para que Bane e Zannah pudessem adquirir o conhecimento coletado de Hetton. Quando Hetton e cinco de seus guarda-costas / assassinos sensíveis à força confrontaram Darth Bane, Hetton não pôde fazer mais do que implorar a ajuda de Zannah enquanto ele e seus assassinos eram facilmente despachados pelo Lorde Sith:
[Darth Bane] whirled around to see a small man in his fifties [Hetton], clad all in black, standing on the far edge of the camp. In his hand was a green lightsaber, though it was obvious from the way he gripped it that he had never received any proper training in how to handle the exotic weapon.
At the man’s side was [Darth Zannah]; she had not drawn her lightsaber. Bane snarled in anger at her betrayal, his rising anger fueled by the chemicals the orbalisks were pumping into his system.
“Today is the day you die, Darth Bane,” the man said, charging forward to attack.
At the same time, the five red-robed figures rushed in from behind him. Bane spun and thrust his open palm toward them, lashing out with the power of the dark side. Like the Jedi and Sith, one of the first techniques Shadow Assassins learned was the creation of a Force barrier. Channeling their power, they could form a protective shield around themselves to negate the Force attacks of their enemies. But if an opponent was strong enough, a concentrated attack could still breach the barrier. Darth Bane, Dark Lord of the Sith, was definitely strong enough.
Two of the assassins were stopped in their tracks, knocked to the ground as if they had run into an invisible wall. Two more, weaker and less able to defend themselves against Bane’s power, were sent flying backward. Only the fifth was strong enough to resist the Sith Lord’s throw and continue his charge.
However, without his brethren at his side to harry and distract his foe, he found himself the sole focus of Bane’s wrath. Unable to defend against the savage sequence of lightsaber cuts and thrusts, he fell in a matter of seconds, half a dozen fatal wounds scored across his chest and face.
While the four remaining assassins regained their feet, Bane wheeled back to their leader. Wisely, the man in black had stopped his own charge and was gathering the Force. As Bane stepped toward him the man unleashed it in a single long, thin bolt of indigo lightning. Bane caught the blast with his lightsaber, the blade absorbing the energy. In retaliation he struck back with lightning of his own—a storm of a dozen bolts arcing in toward his target from all angles.
...
“Zannah!” the man shouted. “Do something!”
But Bane’s apprentice didn’t move. She merely stood off to the side, biding her time and observing the action.
The assassins fell on Bane again, but instead of repelling them with the Force, he allowed his body to become a conduit, turning himself into a physical manifestation of the dark side’s tumultuous power. As he spun like a whirlwind, his blade seemed to be everywhere at once: hacking, slashing, and slicing his enemies to ribbons.
All four assassins died in the attack, though one managed to land a single blow with his force pike before his throat was slit, the wound so deep it nearly severed his head. Fueled by rage and fury, Bane shrugged off the deadly electrical shock like a rancor shrugging off the bite of a venn-bug.
Once again he turned his attention to the man in black. Bane marched slowly toward him as his adversary stood frozen in place, paralyzed by the terrifying knowledge of his own imminent death.
“Zannah!” the man cried out to her again, holding his lightsaber vertically before him as if it were a talisman that could hold the approaching demon at bay. “Master! Help me!”
Bane chopped down with his own weapon, severing the man’s sword arm at the elbow. The man screamed and dropped to his knees. An instant later his voice went silent as Bane ran him through with a single hard thrust, the lightsaber entering his chest just below his heart and protruding a full half a meter out the back of his shoulder blade.
Darth Bane: Rule of Two, pp. 202-204
Mesmo os usuários do lado negro treinados não diluem demais o lado negro da Força. De fato, os Sith frequentemente usavam aliados treinados do lado sombrio, como os Inquisidores e o Mãos do Imperador como peões para promover seus objetivos. Como expliquei em minha resposta ao motivo pelo qual os Inquisidores não quebram a Regra de Dois , a distinção entre um Sith e um usuário comum do lado negro é que usuários comuns do lado negro - mesmo quando aliados aos Sith - não têm acesso aos segredos e treinamento completo dos Sith, nem participam de experimentos para aproveitar todo o poder do escuro. lado:
The two of them were in Sidious’s lair, a small rock-walled enclosure beneath the deepest of the Palace’s several sublevels that had once been an ancient Sith shrine. That the Jedi had raised their Temple over the shrine had for a thousand years been one of the most closely guarded secrets of those Sith Lords who had perpetuated and implemented the revenge strategy of the Jedi Order’s founders. Even the most powerful of Dark Side Adepts believed that shrines of the sort existed only on Sith worlds remote from Coruscant, and even the most powerful of the Jedi believed that the power inherent in the shrine had been neutralized and successfully capped. In truth, that power had seeped upward and outward since its entombment, infiltrating the hallways and rooms above, and weakening the Jedi Order much as the Sith Masters themselves had secretly infiltrated the corridors of political power and toppled the Republic.
Save for Sidious, no sentient being in close to five thousand years had set foot in the shrine. The room’s excavation and restoration had been carried out by machines under the supervision of 11-4D. Even Vader was unaware of the shrine’s existence. But it was here that they would one day work together the way Sidious and Plagueis had to coax from the dark side its final secrets. In the intervening years he had actually come to appreciate Plagueis for the planner and prophet he had been. Such perilous machinations required two Sith, one to serve as bait for the dark side, the other to be the vessel. Success would grant them the power to harness the full powers of the dark side, and allow them to rule for ten thousand years.
Tarkin, p. 101