why do players disable chat?

thats more on the evil internet trolls than the parents but parents gotta watch out no matter what

Most of the messages I get are from people who get mad because I'm "too slow" (ironically, I usually win against them) or going on angry, disgusting rants after they blunder their queen.
I just gave up after a while. It wasn't worth the effort.

what are they afraid of ?
Me spamming HAHAHAHHA in the chat after win on time with one pawn left down 23 points of material
what are they afraid of ?