To be fair even if you manage to blacklist someone it wont do much. As far as I know (someone can correct me if i'm wrong) blacklisting someone only stops them from sending you whispers. Literally that's it. I think it also blocks any texts they may put in the public chat...I think...XD

With that said, if the dude still has you on his FL he can literally stalk you, he knows exactly where you are at, he can go to your home, he can even join you for roulettes (lmao), he can come up and do emotes to you like slap you etc etc.

That guy is probably after your cute dragon girl hahahaha!