I hate to mention this because it sounds so socio-economically prejudiced but...that urination incident occurred in a dollar theater in LA.
Actually, the theaters here in OC are very nice and people tend to be polite and courteous.
I had my own little outburst last night when we took my son to see "The Hobbit" (his third time) and when the two dwarves greeted each other with a big bash to their foreheads, I went, "OUCH!!!" My husband laughed but I was embarrassed because it took me by surprise.
The good thing is that there were only maybe two other parties in the place.