[Potato Uno]

Anyone with C++ knowledge and basic knowledge of Sourcehook can easily remake what Xykon has made. It's not really anything secret. You just need to reverse engineer the engine binary, hook to in-game functions and detour them. Just merely getting a symbol dump of engine_srv.so functions tells you what you need to detour to do illicit things.

So use the extension if you want. With the way TF2 is set up with almost all traffic funneling to matchmaking, you won't be doing much or any damage anyway.