[account42]

They DO have copyright on the reverse engineering work. But that doesn't mean that they don't have full copyright over the code which looking at the LICENSE file alone it looks they are claiming. There should at least be a copyright line mentioning the original authors, even if just "Unknown Authors". They also obviously don't have permission to redistribute their derivative or to create it in the first place.

Its also ironic that they expect others to follow their license when they are fine with ignoring the copyright of the original hackers.

Ultimately though, copyright as we have it today is extremely silly and all they are asking for is attribution which IMO should be the default.