We had a discussion on
gamification where a "like" button was brought up, and accepted only conditionally. A concern was people liking everything, and the thought was that (in context of earning experience) to like a post, you spent a nominal amount of experience that could potentially be transferred to the post author.
I like the idea of a like button in general (and I do aim to have stuff be more thematic based on game, but I'd need the help of a graphic designer or artist for that). I would like to renew to the gamification discussion over all.