LOL that's Junsu from TVXQ/JYJ out at a restaurant with his friend.
Those are all teenage girl sasaeng fans.
TVXQ/JYJ have had some of the worst issues with sasaeng fans. I don't think EXO really compares just yet.
SJ still has it really bad as well. The thing about Exo is they're rookies and they already have it this bad, its only to get much much worse for them.