You mean the creepypasta designed specifically to get annoying teenagers to endlessly repost his crap because they think it makes them look dark and creepy? No, I am not. If I was still 14, I might find something appealing about a guy who's entire character is based on having weird eyes and a fucked up mouth, but as that was 14 years ago, its a bit too late.
Apparently, cutting people's mouth's into a permanent grin is just irresistable for psychopaths of all cultures, because that exact sort of mutilation and ensuing urban legend appears in nearly every culture you could name.
...name one plz? I've never heard of this as a multi-cultural thing i've never even heard of any old stories or anything about this... all i can conjure up is the joker and gonzaemon ushimata from shigurui