Via Exit, pursued by a bear, poet Joshua Clover weighs in on voting:

impracticalities are possibilities

You will have read some version of the claim: By not voting, you are simply giving more weight to the votes of those who do bother to vote....In practical terms, you are voting for whoever happens to win.

Perhaps this is so. Of course, by the same logic, by not fighting, you are simply giving more weight to the violence of those who do bother to fight. Moreover, by not shopping, you are giving simply more weight to the purchases of those who do bother to shop. By not laboring, you are simply giving more weight to the value of those who do bother to labor. So we can dispense with the doctrine of pacifism. Boycotts should be avoided at all costs. General strikes should be mocked at every turn. And so forth.

In short: you are free to make any choice except the choice not to participate. Yes, who could disagree? In practical terms, that is exactly the logic everywhere on offer.

(posted on his blog)