I haven't even thought about these implications.
I can already see there will be a lot of self-voting-hater-drama on the horizon. Jealousy is a sneaky little b*tch!
But hey, I'm not afraid to give myself a pad on the shoulder, and i doubt anyone will mind a red-fish upvoting his own posts, it's only a few cents anyway. That looks a bit different though if an upvote is worth tens or hundreds of dollars!