Since I started reading up about the upvoting thing I have been against it. Well not totally - I just hate it when I see people upvote their own post when it adds no value to the post. All it does is give them money and bring their post up the list while other (probably more insighful posts go dow) I agree that if you think the comment is essential or imoportant then for sure but I think people just abuse and upvote themselves to much