Luckily for me, I haven't experienced it... One thing I have experienced a couple of times is clients being extremely rude and I try to never lose my cool or get salty with them
One time, I pointed out to this dude that he was being unnecessarily rude and had been rude from the beginning, even though he hadn't even paid for the work I was doing yet.
Looking back, maybe it was even some kind of scam and I just didn't realize it at the time because he would still have had to pay for the work.
Well, he threw out a lot of insults and maybe because I didn't respond with the same energy, he got even angrier... poured out more insults and eventually deleted the chat : D
I searched for his username on Telegram, messaged him and said he shouldn't have deleted the chat because I was actually starting to enjoy it. Then he deleted it again and blocked me... yeah, I was taking a bit of the piss by messaging him again : D
The whole point was to show that he's a coward. He typed out so many insults and deleted the chat right afterward to make sure I read them but couldn't respond... and of course, to not pay for the work.