One day when I was playing on the server, I decided to take a look at people's rates and on 23 people, there were 4 people that had their rates at 10000. I think that Zblock should be installed on the server.
So what does it do?
zBlock was first developed as an addition to the "CSP" server plugin, at this time VALVe had accidentally let a convariable slip that would allow players to "wallhack".
"CSP" (CAL Server Plugin) was a server plugin that enforced certain convariables that could either be exploited or created an unbalanced/unfair playing field.
Another feature of zBlock was to make CSP more difficult to bypass, however not too long after release, we determined that instead of making CSP more difficult to bypass, we should instead take on board the functions CSP had due to the significant ease at which is was bypassed.
zBlock now locks certain rates, prevents people from using exploits which they do not openly discuss, so that hack programmers don't have the luxury to defeat it.