But you're not his parent, so presumably you don't have to worry about all those other more important issues. If you fuss at a teen about everything he or she does that bugs you, you'd have no other communication.

Well, actually (in this instance), I've been asked to step in and be "de-facto" parent, so I've had to deal with a few important issues.

(And of course, I get hit up for money fairly often!)