It's certainly a lot more brazen, but otherwise not so very different than a lot of the dumb things I/we did when I was in college. One of my roommates once got into a lot of trouble for using a water balloon launcher at the dorms. It could hurl a balloon about a hundred yards, which could do some damage if it hit the wrong thing (like a face). Niether factor, however stopped us from using it later at our apartment. We were just really careful to be back inside before the balloon hit, so we didn't get caught. We also never aimed it anywhere near (as in within 10 yards) a person, but that didn't make it a smart, or safe thing to do.