Cure,
You've brought up a good point for those who don't know, and with this in mind here are a few pointers that may help you make a good admin down the road..
As an admin, our job is to try and keep the servers "punk free", but we have to be fair. if someone is blatantly cheating (shaking screen, upside down screen, have a crazy score like 70-2, etc) our job is to document it then ban. you do this by getting a short demo, get a steam ID, then ban, but our job doesn't stop there. then we have to upload the documents into the MAUL system. and keep records on our computer so that if a ban is contested it isn't just simply your word against the hackers.
unfortunately there is always that gray area, those players that could be really really good (like me ;-) lol) that might have a score of 48-6, i mean, who has a 8.0 kdr right?? Those are the ones you have to be careful with, those are the ones that you would simply make the demo and upload it to the ban request and let the trained eyes of the powers to be decide. These players could be really good at hiding their cheats, then again they may have a 5 digit Steam ID and have been playing the game for 10 years.
Hopefully that helps you with understanding why we don't just jump in there and automatically ban someone when everyone in the server "knows" someone is hacking