There are spam accounts generated that appear to be the real person you already know. Often actual people either lose their FB accounts because they forgot the

There are spam accounts generated that appear to be the real person you already know. Often actual people either lose their FB accounts because they forgot their password, lost the email associated or the 2FA etc... or they closed the account down. Then real people open another account and re-connect to their old friend groups. Spammers mimic this behaviour by replicating peoples accounts and then sending out new friends requests that appear to be from someone you know. Once you accept the spammers friend request they begin to send you malware phishing links and so on. I'm sure there are other scams around this I havent heard of! :-)