Honor System

NBC again references Ultimate Frisbee.

On Thursday's 10/6 episode of The Tonight Show with Jay Leno, Jack Black, Owen Wilson & Steve Martin discussed "birding". Around 4:09 mark...
JAY: Birders work on the honor system. Is that a realistic concept?

OWEN: I think so...how many things work on the honor system?

JACK BLACK: Ultimate Frisbee...Ultimate Frisbee, you know. They don't have referees. It's self-regulated; that's it - birding & Ultimate Frisbee.