Many times I've seen chearleaders on the endline to the side of their team's basket, so, no issues there.
I've had coaches and players disconcert; I've seen other players walk the endline; I've heard a band drummer hit his drum (ball went in, told him not to do that again); I had one this yr where the PA music "accidentally" went on SUPER LOUD in the middle of a FT - unfortunatey, it was home team shooting (disconcert themselves?).
My least favorite was when one of my P's called disconcertion on a H fan at the other end of the gym and awarded another FT for V.
