American here. Yes, I do vote. In fact, I'm far *more* likely to vote the lower-down-the-ballot races than the big ticket ones up top. Although my vote for President, Governor, Senator or Representative is almost certainly not going to matter, my vote for who gets to serve on the local School Board could very well make a difference one way or the other. It helps that I'm still registered to vote in my home district, which is a tiny little rural cow town where there aren't all that many voters to begin with, even thought I currently reside in a fairly urban college town (I vote absentee).
Plus, if you like third parties, the best way to help them gain the necessary power and prominence to challenge the Big 2 is to help them win lots of little, local races so they can build up a power base.
Plus, if you like third parties, the best way to help them gain the necessary power and prominence to challenge the Big 2 is to help them win lots of little, local races so they can build up a power base.