I don't mean to be disrespectful, but you may be overestimating how much people read.A disclaimer is all you need. Not the permission of a dev to PIRATE their game. I'm sorry if that's offensive but that's how it is. If someone bitches about breaking their save then you point out it had a chance to happen and tell them they are responsible for it. The dev, the website, and no other users are responsible.
In game, it says "THE DREAMSCAPE AND EVERYTHING THAT HAPPENS IN IT IS NOT CANON"
But there have been hundreds of mentions about "Since Ashley and I are married now..." or "You have a succubus in game, can we get a vampire?" or "I already had sex with Autumn in that event with Violet, but she's somehow still a virgin?" or "Why do I have two Jins in my game?" etc. Even if words are put literally seconds before the rest of the event, people will still not read it.
I've had to say dozens of times "I literally answered your question right above your post". People are blind as bats, or just can't read English.
I don't mean to say "We need to protect the idiots from themselves" or anything, I just mean to say that certain things can be avoided. That's why, even though I would lose a lot of money, I'm not against pre releases being leaked. They rarely have any bugs. Of course I would prefer nothing to be leaked. But it is what it is, it's a free game in the end.