Name some reasons why you were blocked ?

I get blocked sometimes when I make negative comments on pedophile posts! (But I do report them before that happens.)

I am only aware of one other time I was blocked. I have since come to the conclusion that the person in question has serious psychiatric issues. At any rate, he took it as a "personal attack" (his term) when I researched the etymology of a word he was using and pointed out to him that it had a history different from what he was assuming.

It is quite possible that I have been blocked on other occasions and never noticed!