The point is I'm not going to lend you any legitimacy by picking up the shit and eating it myself, then turning at the people around me and asking why they aren't eating it yet. I'm going to make it impossible for the shit peddler to hide their willingness and ability to abuse their power. If I'm eating shit either way, why would I do it in a way that makes it apparent to outsiders that I'm choosing to eat shit?

And no, when you scold people for not participating in a system, you are not just not "refusing to acknowledge its legitimacy". You are promoting it, whether you care to or not. You are promoting the idea that everyone is choosing these options out of complete and true support of complete and unbiased information. This is especially true when people like you misrepresent and refuse to understand the arguments of those who choose to abstain or vote third party.

You are saying, "if you participate in this system, you could change the way things are going; and if you don't, then you implicitly consent to it", which is simply not true. Interestingly enough, you know how little power a person has when acting as an individual, which is why you minimize the reach of individuals when it comes to forms of political action other than voting, but you never apply it to the situation of voting where the ruling class has vast numbers of ways to influence people's behaviors in whatever direction they want.

The change can only come when we have built the ability to move cohesively as a class, or a voting bloc if you will, that can either take power for itself or force our leaders to come to our table if they want our compliance. We can only build this by overcoming the resentment we hold for other members of our class, and putting one foot in front of the other; turning one person at a time towards the inner workings of the machine that the ruling class works so hard to hide. Not by stoking resentment and wasting our energy trying to manipulate an illegitimate system while we wait around for the movement to build itself.

You cannot convince the rich and powerful that it's politically unfavourable when it's economically favourable to do genocide.

They don't care about what people want. They care about what they want, and that's US imperialism.