Down by the University, where I work, kids are famous for riding the wrong way. One just got killed - driver turning right & looking left for on-coming traffic. Never expected to see a cyclist coming up on the wrong side of the road.
You should have heard the outcry from the family of the cyclist. I mean, it's too bad the kid was killed, but he wasn't without fault.
Oh - and helmets? We don't need no stinking helmets!