Watched this video with interest last night.
It shows Foo Fighters front man, Dave Grohl, ejecting a fighting fan from a gig in London this week. The video below shows him at a Nirvana gig, I think in 1992, when a security guard attacked Kurt Cobain.
In both videos you can see how he immediately handles the situation. Not many stars would do this these days.
Kudos Dave! The show must go on!