I haven't read all the replies to see if this has been posted yet, but one of the consequences is erosion of trust in reality itself: we're starting to see the comments "are you a bot?/is this real? I can't tell if you're serious or if this was from ChatGPT".

It's quite possible that soon the majority of comments online will be with bots, or people will just avoid discourse more and more because they don't know/believe they are talking to a human.