[ModernMech]

This crucial difference here is which party is generating the content. In the case of a private journal, it's one way communication from the writer into the journal. In the case of Google docs, you communicate with Google's servers, but Google is never generating any content for your document it doesn't want to. It's still you generating your own thoughts. Google is not on the hook for anything you write in a Google doc.

In the case of AI Dungeon that distinction is lifted. By using AI Dungeon what you're effectively doing is engaging in a creative process with the AI. It's no longer a one way channel of your own thoughts. Now AI Dungeon is actually generating content, and that's where things become problematic.

It's also the reason this is not thought crime or thought policing. You are still free to think your own thoughts, and you're even free to write them down. You can write down your thoughts in AI dungeon if you wish. But AI Dungeon is under no obligation to engage with your thoughts if they contain subject matter to which they object. If you want to engage in a fantasy with the AI about abusing minors, you are free to attempt the engagement, and the AI is free to say no. That's not thought policing, that's freedom of association.