I don't think the concern is that the LLM is going to disclose crucial information on how to do an attack, it's that it's a thing that talks like a human but doesn't have the moral compass of a human and tends to agree with whatever you say.
Anyone serious about being a terrorist can figure out how without alerting authorities. But anyone uncertain they want to do it won't get the pushback they would if they talked to a real person about it.


Couldn't they just implement id verification without a requirement from the law? That way they wouldn't need to wait for the governments to one by one pass laws