Right, but putting a generic Python decompile script on github would be legal. Uploading CCP's copyrighted code is not.

This is one of the rare cases in which DMCA request makes perfect sense.

While not hard, it is not super-easy either, they are encrypted etc. Anyone with a bit of knowledge about python and debugging a Windows application and a few hours can do it.

You can't decompile a program if you don't have a copy of said program.

However, when the decompiled sources are uploaded to a public server, nobody needs the original program, to use it.