I had a similar experience the other night at my daughter's 6th grade holiday concert. Some teenager was yapping on her nextel for about 3 mins during the performance & I turned around to her and in a matter of fact voice I told her she really should take her converstaion outside.... she produced the dumbest "i don't have a clue but who do you think you are " look i have ever seen. That's where it ended, but the nerve of the trollette!
I demanded a refund and was initially refused because by then the movie had been going on 45 minutes. I needless to say got my refund.
And movie theaters wonder why their average age of the patron has fallen dramatically in the past thirty years. (Families were bigger then too)
Start carrying a 2x4 to the concerts.
Trollete's, beware. ;-)