I've had a cop stop me before and told me to walk it because i wasnt wearing a helmet, i dont think they care about them at all. There is a lot of people around here that ride them. They wont conviscate your bike right away. They would if you kept riding it without a helmet and repeatedly got caught. Thats just my thoughts.
Heres my bike.

This was before the frame stretch

And me takin it for a ride down the backroad.