I recommend all server admins make sure they have this in their server config:
sets uu_restrict 15
1+2+4+8 = 15
1: Hide origins of specific models
2: Hide entity info of specific players
4: Disable the navigation system
8: Disable wallhax-like rendering options
16: Force silent mode (not required, but keeps them silent)
use 31 if you want force silent mode also.
MUST BE "sets" not "set" or "seta" or it is useless.