It's good you did, though. People who didn't bother are contributing to the discouragement of others by keeping the vote totals from reflecting how much opposition to the fascist democrats there really is. I admit that's a psychological factor, but that's an important factor none the less.
When the actual size of the opposition isn't ever reflected, then even when something happens will suppress the democrat vote, a lot of the opposition will stay home anyway because they still won't believe they can tip the balance. You definitely did the right thing.
People in your position and in the places where “Mitt would win anyway” should also consider the fact that at least a few states grant the winner of the national popular vote a portion of the Electoral votes even if they didn't carry the State. That approach may very well become more common so people should get used to the idea that the national popular vote total is important even when their vote won't a difference in their State.
Regards
The electoral system in NY is so crappy. It does get one discouraged
The electoral system in NY is so crappy. It does get one discouraged