And on the opposite end:
During my showing, people were so disgusted that people actually left the theater, went outside to the local farmer's vegetable cart, brought some tomatoes, returned to the theater, and started hurtling them at the screen. Well, that's not entirely true, I thought I saw some lettuce and artichokes in there also. It was dark so I really couldn't tell...
In addition, when Wonder Woman showed up, a couple people started shouting "Hey! That's not Lynda Carter! FAIL!!!" while everyone else just gagged on their popcorn.
Those brave souls who were actually still in their seats at the end of the movie were so angry that they ripped out their chairs from the floor and started a mini-riot. Luckily, there were only about a dozen people left unless it would have been much worse.
In the lobby afterwards, I noticed about ten people crying into their soda cups mumbling quietly to themselves. Meanwhile, several other patrons grabbed a bunch of toilet paper from the bathroom and started tee-peeing the entire theater, both inside and outside. As I walked to my car, I turned around and noticed graffiti on the side wall of the adjacent building in big red letters that said "BATMAN V SUPERMAN SUCKS!!! SAVE YOUR MONEY FOR CIVIL WAR!!!"
True story.