Please label it "the gruseom button".
I think some people here are learning that hugely self-confident, strongly opinionated, obvious writing tends to spark a strong agreement reaction on the readers, who quickly upvote a comment that adds nothing to a discussion. These are a problem, as they encourage snark and posing over effectively arguing things out, but they are very hard to treat as disagreeing with them is likely to cause knee-jerk reactions in many upvoters.
While I agree with the general case, in my specific case I called somebody an "idiot" out of anger and tptacek called me on it. It was quite mortifying and I've tried to watch my words since.
I never see "nice" tellings-off. A "nice" telling-off might be: "reader123, this comment is mean. please be nicer"