For what? In my state there's no requirement to show ID. When I first moved here I attempted to show mine at the poll and the poll worker told me to quickly put that away and she didn't want to see it. I'm not even sure it's legal for them to ask for ID here, given her panicked reaction to me trying to show it.
Since then I've voted in this state for around 10 years and it's always the same. I could say I'm whoever I want, and just be given a ballot.
Edit: I don't live in NY either, as the other poster used as an example. ID should be an obvious and necessary requirement, but it isn't in many states.
And again, you still have to be willing to commit a felony to move the needly by ONE vote, which is not likely to be very common. The risk/reward simply isn't there.