A friend of mine asked a question and, while he got some pretty good answers, there was an obnoxious commenter who asked a set of follow-up questions. I've checked the conversation and as far I can see, it's someone who simply doesn't have an answer but wants to sound important.

My buddy got downvoted and the question was closed. I would just tell him to forget about it - not everybody here is mature yet - but there was in fact other people remarking this. So I went and checked history of the said commenter.

My impression is that this person uses SO as a platform for filtering his own frustration and anger. We don't need such behavior in our community.

Should one report such incidents? Where and how?