If you do a user search on the mod log for "HexbearGPT" to see that user's deleted posts, I think that'd be a fairly solid example. Being an asshole (that time under the ableist/concern trolling "start being normal" variety) under pretenses of a "joke" then devaluing everyone that didn't accept the "joke" resulted in a ban.

Maybe one of HexbearGPT's ban-evasion alts might get set off by me mentioning that (a few mysterious new accounts with account histories that started a day or two after that ban already did that before) but that's the first example I can think of.