You don't have a choice because they tell you that you don't, and you (and everyone else) believes it.
If Stalin and Hitler were on the ballot, who would you vote for?
You certainly wouldn't want to throw your vote away. That would be crazy.
... If Stalin and Hitler were on the ballot, who would you vote for?...
We'll find out, since that'll be the ballot in 08.
Choosing not to participate in an obvious voting farce that could only result in losing one's liberty, seems extremely rational to me.