although i don't advocate that guy's rudeness, i understand what he's doing.
there are many times when i've asked questions basically like his, "what are the chances of this hurting me and how much could it hurt me?" chances are i was gonna do the behavior anyway.
eating moldy weed probably didn't seem like that much of a risk to him, and he probably wanted to get high.
the worst thing that you could do is react with anger to his initial anger.
/brownies