I've been screaming essentially the same thing into my pillow as I cry myself to sleep at night for years! There's absolutely no reason people should be sneaking weapons and projectiles in...and there's even less reason why we should be unable to locate and punish them. If I threw a bottle at a basketball game around here, I'd be tackled and arrested within 45 seconds, guaranteed. And yet in Greece, the land of freedom and no repercussions, everything goes.
The diving, on the other hand, seems completely unenforceable to me.