I always thought it was my desire to live that keeps me from walking into traffic despite any "distractions", but now I learn from you it was the threat of a $250 fine all along.
Actually, I don't think it's so much the fine itself but the sense that not crossing at a crosswalk is "wrong." The the laws against the behavior (and the penalties necessary for such a law) are there mainly to create that understanding.
Of course self-preservation is also a factor, but I'd wager the behavior is more effectively inhibited when it's not the only factor.
Do you have a reason beyond your gut to believe jaywalking penalties work?