i believe it's only lawful to not wear a helmet if you have a proven $100,000 insurance policy or something like that. but we all know most of the people w/o helmets probably dont have that type of insurance on them, but it's not caught since you cant just look at a biker and tell if he has insurance or not...which is why some of the jerk cops will find reasons to pull over bikes (for some minute detail) and check their insurance and licensing.
also another thing. i do understand the deal with buying the flush mount signals and this and that and removing stuff that sticks out for aerodynamic purposes, but the whole seeing what lengths you can go to with hiding your license plate under the rear tail or something is just asking for harassment. i.e. with my car i used to have the smoked plate cover, and long ago i had some hyper white bulbs (that were kinda bluish) on a former car i had. i realized not only were these trends gay and stupid looking but they left me open for cops to harass me and check for other things (tint, bust me for muffler stuff, etc)...so as far as that goes, dont put illegal lights or do illegal tag modifications, and you'll probably get f'ed with alot less. cops ignore me now, i drive normal, car is subtle/stock, exhaust is stock looking, resonated/quiet, my bulbs are correct. works wonders.