Dude, just set up two factor authentication and use a different password for all of your accounts, so if there is a breach somewhere then all your other accounts are safe, don't make this sound like a zombie apocalypse.
Spam like this on forums has always been a things. I've been in a ton of them over the years and something like that would always happen from time to time.
In 4 years of being on this forum, the spammers here are completely new to me. Edit: I also realized we joined almost exactly 4 years apart lol.