Its a prank, and a good one, from some high-spirited young people. It seemed like a good idea to them.
What, are you gonna shoot somebody who shoots a cap pistol? You cant tell the difference between a cap pistol and a real pistol? You cant see it is a 10-year-old knuckleheaded kid?
If you are going to conceal carry you gotta be in control of your emotions and pay attention to your surroundings!
"...be in control of your emotions..."