"No and not likely," he says. "Check that if you want."

He is telling the truth on both counts. He's willing to break laws that interfere with his survival, or that are so pointless and unenforceable it's not worth it to comply, but strongly prefers to avoid trouble otherwise; he has a similar approach to violence, and has been receiving a strong impression that he is far enough away from home not to have to worry about the major threat likely to incite violence from him in the name of survival.

There is the matter of what happens when you lock him in an enclosed space with no way to leave, but that's an extremely specific situation and, as proven here, more likely to hurt him than anyone else. It would be dangerous to enclose him in a ward and then get in there with him; he has worked on this problem enough that, contrary to his overcautious warning to the children, in the heat of the moment when rational decisionmaking is beyond him he will choose escape over causing harm whenever both are available.