There is a reason mega-famous musicians like Demi Lovato, Lady Gaga and even the Biebs roll with about twenty body guards at all times. Their fans are as crazy as they are.
Fans rushing the stage can be dangerous for everyone involved — from the performer, to the security people, and especially for the rabid fan just interested in touching their idol for a mere second. Performers and security don’t know if the person has a weapon and the lunatic fan can’t be sure security won’t deliver an ass beating just for fun.
While we’d never suggest trying this at a concert — you’re paying way too much to see these clowns already, don’t add bail and a fine to the overall charge to dad’s credit card — these videos are fun to watch.