You fundamentally cannot address this problem, because it requires considerable context, which isn't reasonable to offer. It demonstrates the classic issue of how knowledge is a tool, and humans can wield it for good or evil.

Humans are notoriously bad at detecting intent, because we're wired to be supportive and helpful...which is why social engineering is becoming one of the best methods for attack. And this kind of attack (in all its forms, professional or not), is one reason why some societies are enshittifying: people have no choice but to be persistently adversarial and suspicious of others.

As for AI, I think it's going to be no better than what you end up with when someone tries to "solve" this problem: you end up living in this world of distrust where they pester you to check your reciept, have cameras in your face everywhere, etc.

How do you defend against that? I'm not sure you do... A tool is a tool. I wouldn't want my CAD software saying, "I think you're trying to CAD a pipe bomb so I'm going to shut down now." Which I think turns this into a liability question: how do you offer up a model and wash your hands of what people might do with it?

Or... you just don't offer up a model.

Or... you give it the ol' College try and end up with an annoying model that frustrates the hell out of people who aren't trying to do any evil.