If your friend told you a secret plan for runaway from home, what would you do and why ?

runaway kid

I would like to tell him that it is the ever dumbest secret plan that he'd tell. But if there's a reason of him saying that to me ,then, and if that reason weighs a lot heavier to my conscience then I go with him. I can tell that I can go him because I'm easily persuaded by trust and I think there's a benefit on getting rid of his plan