I think voting others rather than yourself is a better choise in the longrun solely because this is a social media site. I rather upvote bunch of people that may some day upvote me back than use my daily votes selfvoting. If I'd only selfupvote, there's zero change anyone else upvoting me back than me, myself and I. And few selfvotes isn't bad if one has a good reason. What ever it is.

So I don't care if someone else selfupvotes. It's a personal choise and anyways it's much more visible than paid votes. Which I have almost nothing against if only the trending page would be done a bit differently.