Okay, this idea just randomly popped into my head, PVP "Zones" what these would do is allow the user to set boundaries for PVP. For example, Shadow Games! Hosts always have trouble with people spawn killing after the die, with this block, that all can stop! This can also help map makers with making PVP arenas, they can set one place to have PVP off, and another have it on. To set it up I would think you would have to put two of these blocks in the top left corner and the bottom right corner, then get a number like you would get from the telepads and type "/setpvp (number) (pvp setting)"