True helmet story:
About 20 years ago I had to do medical research project for a requirement. I started doing one on motorcycle helmets, safety aspects etc. (mainly because I hate motorcycle helmet laws myself). Anyway, I ran across a medical report from a British doctor in India before WWII. He pointed out that for some Sikhs, religious practice and customs with regards to headwear precluded helmet use. For them, he recommended, and I quote exactly, "... a very well-wrapped turban."
Yeah, that's gonna help...
I thought maybe I could convert, then claim a religious exemption from the state of Washington. Since I lived in Seattle at the time, it probably would have worked.