I've probably met a few. But how would I know? I'm no expert in reading humans.
Ironically, I googled about this guy in my lab who I've written on here about before (about shy, lonely guys who seem to like me). His behavior is getting weirder, kind of embarrassing. So I googled "why is this guy terrified of talking to me." (I don't want him to talk to me, I'm just baffled by his practically jumping in his seat and jittery behavior.) Well one of the first results is from social phobia world. At first I wondered if google gave me that result because I'm on here a lot lol. Well yeah clicked on it and read through it, and the situation was kind of similar to mine. It became obvious the guy has social anxiety or some personality disorder. I would have pegged him as shy, weird but I never considered a psychological condition.