It's up to the server to set the level of display on admin commands. By default it shows everyone on server that an admin has done something, and shows the admins WHO did something. But you can make it not show anything to non-admins
Interesting, so without hard proof (I.e - Fraps of being slapped about or health going from 1 back to 100, etc), it's difficult to prove.
Empty accusations none the less ofc.