A previous account I used was blocked for "suspicious logins" which was "for my protection".
I suspect that it was purely due to me beginning to use VPN and switching locations often.
Anyway, I couldn't recover the account because I had to associate an email to recover... I know I can use a throwaway, but I just never wanted to associate any email. I loved that you can use a simple username and password.
That account is now in the graveyard along with my latest account.
I left twitter a while ago too. Reddit had people in need that I could help, twitter just had trolls mostly.
I am now NOSTR only and Reddit lurker, but I let's see, every now and then I start to reply and then remember that I'm banned so I may end up abandoning it all together to avoid that negative feeling.
I never gave Stacker News enough attention. Maybe I'll see how that has evolved.