I knew someone would ask for this. I have seldom seen it cause issues, in both my length of time here and when I was a moderator on the forums. The only times I can recall are when there was a hot thread asking for personal blunt opinions (And that was all rather recently!) and people hit that like button to show that they agree instead of posting the same thing over and over again making half that thread redundant. Around 98.7% of the time I see the like button used, it causes no drama at all. Everything has or will play a small part to a major problem but you don't see that getting removed, for example thread posts have caused extreme drama more than likes but we wont remove those now will we (obvious joke but has a point)? Don't let the few times it caused problems outshine the thousands upon thousands of times it hasn't.