Yob concert gone wrong

Well, I was gonna go to a concert with the headlining band Yob just 45 minutes ago. It said online that it was gonna be an all-ages show; but when we arrived, Lo and behold, It's now a 21 and older show. WHAT THE HECK???? Geez, those guys have no clue what they're doing. *Sigh* Oh well, there'll be other shows...