Quote Originally Posted by Vahlnir View Post
In order to do that, they would have to install an anti-cheat, because other than visually seeing it, there's no way for the game itself or its players to catch it. Add-ons and mods are all handled outside of the game's tracking limits, and the game is flawed by design at its core by allowing such things to be easily manipulated.
Nothing wrong with anti-cheat systems Valve uses something alike it on steam.