We used to like to have fun with a Latino fraternity at our rival campus during football season, especially during the week before the big game!
Once, we loaded up a bunch of Super-Soakers into our cars and headed over to their chapter house. We hid in the bushes and on the side of the house while they were in their weekly meeting. When they came out, we let them have it! They were soaked, and laughing so hard some fell down on the front lawn!
Another time, we borrowed a BBQ grill from another Latino fraternity for a fundraiser, and held on to it. It was during the days that "guestbooks" on websites were big, and we made a post on theirs saying that we had the grill, for ransom! Messages about the grill went back and forth for like 6 months, but we finally took it back to them. In reality, we just didn't have access to a truck that could transport it. That was one you kind of had to be there for, I know. lol!