While we're on the subject - I work sometimes at a huge facility in Beaverton OR, which has 6 courts (not as big as the one in Tualatin OR which has 9, but it'll do). To prevent the theft of basketballs, they do not allow anyone to bring their own in from outside, but supply all balls used in warmups and games.
This past summer, I was doing a 7th grade boys rec game. Each team is supposed to get two balls to use for warmups, halftime, etc. At the half of one game, one of the teams grabbed all four balls and proceeded to use them to warm up.
One of the boys from the other team came up to me and asked, "Isn't there some kind of ball quota?" I replied, with a straight face, "Yeah - two per player, girl's league's different."
It took him a second to "get it", but then he started to laugh. He told the rest of his teammates, and from that point on, I was the "cool" ref. I guess I my level of humor is about 7th grade.