That is very good advice. Unfortunately, their name tags only have an initial for the last name and I remember the lady's name that treated Cam so badly was "something O" but unfortunately by the time the show was over, I had forgotten her first name.
Yes, good advice. If I ever have a problem like this again I will. Two things you always see in U2 concerts are signs and flags, and the night before there were many (including Jimmy Fallon's sign) so I did not expect them to not let me enter the venue.