Voting is economically irrational. It takes a lot of effort to learn about the candidates, and even more effort to learn the meaning of the propositions on the ballots, the outcome of which, if politically relevant to influential special-interest groups, will probably be reversed in court within a year of the election. It takes valuable time to go to the polling place, stand in line, and cast your ballot. Why do people do this?
Does your vote count in the grand scheme of things? Maybe on some closely contested issue in a very small town. Maybe it will end the career of some obscure would-be politician who loses by one vote in a local contest, discouraging him forever from running again. But on a cost-benefit analysis, voting is far more of a cost than a benefit. There is no meaningful payoff for the individual, who bears the costs, even though the hoped-for benefits are dispersed, especially if his candidate loses. Nevertheless, people continue to vote. This can be explained only by their irrationality or their ignorance of basic economics.
The only reason to vote is if you have a local bond issue that you have the chance of turning down. Otherwise, it just encourages the politicians.