I'm not sure if you are being sarcastic again or not but you cannot reverse engineer a server if you don't have access to an "actual" server. Which no one does at the moment - apart from TW employees.That's just some chat mod. A reverse engineered and hacked server is a completely different thing.
That chat mod and this mod is basically doing the same thing. Transferring information via relayer server and showing that visually on the game.
I'm not vouching for this shady Russian guy - especially now I'm seeing that his dll is heavily obfuscated. But there is no violation or any sort in this mod as far as I can see.