We really will not know if it happens. Mostly people just repeat information, often inaccurately. For accepted facts, trained machines are more reliable than people. For emotional content people usually give plenty of clues about whether they will be agreeable or not, machines can present totally bizarre responses with no prior warning.

I am English; born and educated in England, Europe, I would guess that the original post was written by a human. I have been fooled by simple bots in everyday (typed) conversation. I would expect super advanced AI to be far more flexible in it's orthography than a normal human, so would try to converse with it about cosmopolitan subjects in various argots.