(Anonymous) 2021-01-03 11:55 am (UTC)(link)
AO3 made me sock up by accident, kind of. Some bug duplicated my sign-up so I was signed-up twice with the same username and identical requests. No clue how it happened, but it was a pain in the arse to fix. >:(

(I'd socked up for real in the past, but I hope I wasn't quite that obvious about it. Not this year, though, because I'm trying to cut back on exchanges.)