For now, maybe. Long term, I don't think so. These patches are big "fuck you" to morality police and you can't expect them to take it and do nothing. The more mainstream it will get, the sooner they will need to hit back.
If it's something simple like few changed words in RenPy game, they can't blame the author of original game, because anyone with text editor can do such simple modification. But adding whole scenes that fit in original game is a different matter. In theory, it could be done by someone else, it's not completely impossible, but extremely unlikely. Plus it's not like the game authors making these patches themselves are too secretive about it, it's enough to lurk in forums like this, chats, ... and they will admit to it sooner or later.
If it turns out that I'm too paranoid and patch-based approach will work forever, then great, I'll be happy. But it would be too easy.