When did they become creepy? ARE they creepy? I don't know. Probably its just because we tend to notice bad facial hair and forget good facial hair. If a guy turned out to be a really bad person, we remember his facial hair if he had any. And we forget it on a good guy. It really makes no sense at all. It is, after all, just hair. But in the 1960s and 1970s length or hair said a lot about who you were and how polite society received you. Hippies had long hair. Traditional guys had short hair. And so there was always a great social and cultural divide there.