In the field of theology, one sometimes finds a job listing that requires the successful applicant to sign a statement of faith. I am most likely past the point of applying for such jobs, so it is safe for me to reveal that I have always maintained that, if confronted with such a statement of faith, I would sign it, literally no matter what it says.
There are several reasons for this. One is that if I were in that situation, it would not be a question of choosing between a job demanding a statement of faith and one without — I would only consider the former if it were my only option for continuing my academic career. Signing would increase my personal survivability and enable me to reach students who might desperately need an alternative perspective. As for the dishonesty involved, I regard the entire system of demanding a statement of faith from faculty members as deeply fraudulent. Signing it dishonestly shows the appropriate level of respect for their ham-handed attempt at uniformity of thought. Refusing to do so out of protest would actually grant the whole thing too much legitimacy.
It occurs to me that we could view voting under a bourgeois democracy similarly. We all know that the system is fraudulent at many levels. The most important and destructive policies are a bipartisan consensus, meaning there is no way to vote against them. All candidates are fake in the sense of being media phenomena, and they all represent a front for the power of moneyed interests. Yet there is a difference between the candidates, and in a big powerful system, a small difference can make a big difference. One choice really is more survivable than the other.
Refusing to vote out of principle or voting for a third-party candidate who supposedly reflects your “real” views grants the system too much legitimacy. It gives the impression that the system could and should give us a positively good option, when we know that it cannot and never wanted to. Holding your nose to vote for the less destructive class enemy is in a way as dishonest as signing the statement of faith, but as a gesture, voting cynically shows the appropriate level of respect for a corrupt system.