Someone from long ago was a FB friend though we hardly had contact over the years, not a close friend in real life. However, I've since found out they're now a convicted criminal.
I don't want anything to do with them, I've gone to unfriend only to find they're account is unavailable which I think might mean they've deactivated their account. They don't show in a search for me to block, I'm worried that at any point they can reactivate their account and pop into my friend list, would this happen, can I stop it? I think previous friends who've flounced off and returned have just reappeared without me knowing. I can check obviously but don't want to be forever looking over my shoulder so to speak. My privacy settings are quite tight anyway. Is there anything I can do? 