The State has absolutely no right to dictate to the people how they should or should not live their lives, nor interfere in any way the freedoms and liberties enjoyed by all, with the exception being where the actions of one is detrimental to the life and liberties of another.
The government in any form has no right to dictate to a lawful adult whether or not to wear any item, be that a helmet, seatbelt, or other item it deems to be 'protective' or in any manner preferable to the government or any other agency, the people having the wit and intelligence to create the government in the first place, by default also having the clarity of thought to determine for themselves what is best for them in any area of their personal lives, and pursuance of their liberties and happiness in whatever form they choose that to be.
If the government has the authority to mandate that you must wear a seatbelt while in an automobile, it also has the authority to dictate the wearing of that or any other protective device in any other area of life, whether that be a motorcycle, bicycle, or even walking down a supermarket aisle with a shopping-basket.
If the government has the authority to mandate that you must wear a helmet while riding a motorcycle, it also has the authority to dictate the wearing of that or any other protective device in any other area of life, whether that be an automobile, walking in a park, or while bathing, the locality being unimportant, and the necessity of 'protection' being the overriding consideration.
When we accept the government's authority to dictate to we the people what we can and cannot do in the interests of our own safety, it will not be long before even the smallest of actions must be tempered by the premise of 'protection uber alles', whether that be the mandatory wearing of seatbelts and helmets, mandatory airbags (which just happen to decapitate small children), outlawing certain automobiles because they are 'so big they are a danger to smaller vehicles', outlawing certain makes, models, and calibres of firearms because 'the public has no foreseeable need for such a weapon'... or even mandating the constant wearing of prophylactic devices during any form of intimate contact, that the danger of transmitted diseases be minimized.
Still, the illegality of some laws are ignored when convenient to some even now, an example being the taxes already paid on gasoline. There is one tax added to the price at the pump before you even pump it, and then there is a sales tax added as well, although double-taxation is already defined as illegal.
So by all means, let us allow illegal laws to prosper. I realize full well that some persons are quite happy and content in chains.