Shutting down FB will just create this problem in the next popular social media platform. This is a problem that needs to be solved, and shutting companies down won't do it.
That's like saying there's no point in putting out house fires, because there's always going to be somewhere else that catches on fire.
When a social gathering (whether its a party at a club or a riot in the streets) exceeds capacity and becomes dangerous, destructive, and out of control the police shut it down for the good of public safety.
