When making a PvP arena, why can't players simply place the respawn pads slightly in the air? The only people who could 'spawn camp' at that point are people who died themselves. But if you place several (3 or 4), it really makes it quite a chore to do so.
I do make spawnpads in the air, but its kinda annoying, because that means people can just kinda sit there, and wait until someone goes under them (also people can hit with hammer)