it's pretty normal/expected to get bum rushed if you get onstage at a hardcore/punk/metal show, but this is some other shyt.
i get the idea of feeling threatened by people getting onstage in 2015, but come on man, that was one drunk girl. dude definitely deserves to get locked up over it.
literally 95% of rappers i see live will always have one dude watching over them/security/drink holder guy. afroman fukked up hard but i guess that's curtains for him.