This made me think of the craziest audience experiences I have had at the theatre. Here are just a few:
During the show CABARET in Chicago at the Shubert theatre a man answered his cell phone during the show and talked on it while walking up the aisle.
At KISS ME KATE on Broadway - a couple who sat in the front row brought a lunchbox. They proceeded to eat from it and sip from soda cans out of straws. All in the sight lines of the cast onstage.
During THE KING AND I on Broadway a little girl was eating corn chips out of a plastic bag during the show. I asked the nanny to have it taken away from her and she told the girl I was a "mean man"
During TALE OF THE ALLERGISTS WIFE on Broadway a woman in the audience kept guessing the last word an actor or actress on stage would say. She kept finishing their sentences. (I'm not kidding)