I think you should cast a vote for yourself, and you're a "loser" if you don't. After all, you are giving your work a vote of confidence by entering it in a contest in the first place. If you can't even vote for your own work, then why do you think it's good enough to put into competition? I think most entrants vote for themselves to get on the leader-board, and that is actually a good idea. Then, they go vote for others, too. That's the way it should be. You are being too harsh.