I wonder What Stallman would think of ROM hacking, and other mod communities that reverse engineer proprietary games, and fundamentally transform (either through direct hacks or rebuilding from decompiled source) them into something more akin to open culture. Legally? No, which is why I doubt he'll ever comment on it, but I imagine he might say that this is a distopian notion where people have to break laws to take ownership of culture because everything is fundamentally non-free.