I did the exact same thing. I’ve been using the name for decades and recently found out about this. My initial reaction was, “Fuck them. I’ve had this username for years and I’m not gong to change it just for them.” Unfortunately, while I know that it isn’t related to them, no one else does. It sucks that they get to take possession of it like that but I prefer the inconvenience of changing usernames over the mistaken association with that shit, so I changed the ones I could and abandoned the ones I couldn’t.