The problem with voting is that it implicitly suggests that everyone will accept the result of the vote. But what if 51% of people were to vote for a law that said everyone had to punch a homeless person in the face? I couldn't accept it, even if the majority voted for it. The whim of the majority should not override the rights of the minority.
Sure, I could attempt to protest the system by just leaving the voting ballot blank or scribbling something on it. But the problem is that only the votes of those who actually voted one way or the other would be taken into account. What I really want is a way to vote against the system itself.
Random thought. What if there was an Anarchy party? I know this would seem self-contradictory, but it would not be your typical party. Such a party would block EVERY bill, both good and bad, essentially preventing the government from functioning. In the absence of government, citizens would be free to experiment with new forms of self-governance with the old system being powerless to stop them.