He's only vaguely acquainted with Sam - never spoken to Dean.

But he's so self righteous about his morals he wouldn't engage in petty thievery on one of the missions the initiative sent them on when the troll tried to convince him to.

[His tone almost carries slight disbelief to it, mixed with disgust.]

So I doubt there'd be much difficulty in appealing to that one's bleeding heart. Worse comes to worst, you could probably drag me along to a confrontation and pretend I'm a hostage or something - he'd probably back off since this vessel's just a kid. Maybe Dean would too if his brother tries to convince him.