Personally, I’d be more than happy to see the “Like” feature disappear. Granted, it’s much more benign than the downvote option that was once a part of the old forums, but given how poorly those features were used back a few years ago and how they were turned into essentially weapons against certain forum members, I’d prefer to never see any kind of like/dislike system implemented again. Just my opinion.
I would imagine, though, that the limit is there that people just can’t go through someone’s post history and upvote everything all at once, driving their number of likes into the stratosphere just because they like the person. In theory, it would make an upvote occur more often because of the quality of the post since there’s a limited number of them that you can give out in a certain period of time.