well, as for launching boxes at the players' stations, I speak for myself when I say my team as had enough problems at the players' stations in the past that we don't need boxes flying at us and scaring the hell out of us.
hehe, well anyways. I agree with whoever said 45 degree angle for max distance, according to the laws of projectiles or whatever, but if you want height, go with something above 45 (duh)... (wow, it's amazing what you can learn in physics class when you're not sleeping)