I did one acting out thing I really regretted. I was on a game-with-forum for young people (most were 8-13, I think, but of course a lot stayed on when they grew older, often quitting the game and only visiting the forum and socializing with their friends). I was in a wheelchair and my mother had ordered me to find a regular sport to participate in. And chess didn't count. So I asked for ideas on the forum. Someone told (by pm) me to stop .. - don't know the translation of the word, basically a physical way of whining, like you tell someone who starts using a wheelchair after only (so no comorbid conditions) a (non-fracturing) stub of their toe - and just go on football (soccer in the US).
Well I lashed out and called her all sorts of names.
She sent a screenshot to the moderating team - I was reprimanded, of course. (You got "points" for breaking major rules, 100 points and you were banned. Usual punishment was 5 or 10 points, maybe 20 points if your offense was truly severe. I got 10 points for doing this. Never got another point in my time there

) Was unable to apologize because she'd blocked me.