At my theater, they usually have a greeter before the trailers start, to welcome you to the theater and see if you have any questions. Some dumbass in the back of the theater asked, "After what happened in Denver, will we be getting bulletproof vests??"
Some people just don't know when a joke isn't funny.
Agreed. Anyone that thinks making jokes or pranks about a mass shooting after the CO tragedy needs to seek psychological help IMO. There is nothing remotely funny about the situation nor is there in scaring people at theaters.