try playing on the body bags server, they allow cheating for every 1. That way no single dude can complain.
I dont know whether u do call these enchancements cheating, but here they are:
-automatic railgun
-u start of with all weapons including BFG
-u start of with the largest number of ammo u can carry
-u have 300 health
sounds like cheating, but it is fun when every one is doing it.
I dont know about any movement cheats etc. but even with every 1 cheating i still am able to come in the top 5.