Now slapping yourself or a friend of you for the luls is OK but if you spot them using their admin powers to get advantages against enemies or to help themselves to climb faster, making a DEMO would be the most useful but you could also make loads of screenshot. The bad thing about loads of screenshot is that it tend to be hard to connect the screenshot to each other
.
Make a demo by doing this:
write "record (name of the demo)"
write "status" so that we can see that the person in the demo is the real person and not just a faker.
write "stop" when your done recording
Then the file that you made should be in the "cstrike" folder on your computer.
Now remember to only make a Demo if your 100% sure that the admin is doing it to get advantages. If you just try to ban one admin that slap himself, then there's not much chance for a ban/removal of the admin rights.