Sort of. It's obviously illegal to distribute, and arguably using it as a reference for re-implementation in emulators or in hardware would be a derivative work, and so also illegal. This could make things harder for emulator and hardware developers who now have to screen new contributors to ensure they have not been exposed to this material. It will probably be a fantastic resource 5-10+ years down the line, when things have cooled off, but for now, it's all fairly radioactive for people and organizations that are concerned about legal action.
