I used to have a private Instagram where a vid got banned off of it for "hate speech" because I mocked an advertisement pic at a train station that had a black kid in the middle of two white kids by singing "monkey in the middle, the middle, the middle" (funny because it's technically self-deprecation).
I got banned from posting on Deviantart for making a shitposting account where I trolled the losers of the "cartoon community" on there just for my own entertainment. It wasn't a technical ban, but I realized that there was a delay in me posting a comment which to me probably equates to a ban.
I got banned from Reddit off of r/politics and r/The_Donald for doing an experiment where I said "Tramp is a good president" and "Tramp is a bad president" on the two respective threads. r/politics called me mentally ill and banned me when they saw me post the opposite in r/The_Donald for "trolling" and r/The_Donald just rolled out a whole meme of Tramp's accomplishments for me to sit in awe at. I soon made a new Reddit account and got banned off r/The_Donald again for low-tier shitposting (describing one of Tramp's allies as a fat man).
On the Farms, I've gotten banned 3 separate times for things; all temporary:
1. Banned from chat for getting triggered at zedkissed60's shitposting and longposting on chat.
2. Banned from the Stonetoss thread for saying "no u" to Null when he was purging people complaining about the placement of that thread and the shitty OP.
3. Recently banned from the NC thread for saying "lol who cares" and then trying to shittily justify my shitposting on a post relating to a dog's death, thus derailing the thread.
I have quite a lot of ban stories actually. Mostly for shitposts and giggles. All terrible, but I thought the Reddit shit and "Monkey In The Middle" stuff was legit funny.