of these head trauma patients which are astronomically more costly to our health care budgets are borne by society because weirdly our -- maybe naturally, the insurance companies don't like to cover motorcycle injuries because of that added health care burden. stossel: this is the argument i hear all the time. other people are paying for this. so this gives the state a reason to intervene. by that logic the state has the ability to intervene everywhere. why not ban all junk food cigarettes, swimming pools. there's a social cost to that. >> it's true. it's true. first of all, we have traffic laws don't we? i mean, i don't think it would be total mayhem and chaos if we didn't have traffic laws. we have seat belt laws. stossel: but two points. traffic laws talking about a car hitting someone else. and we probably have too many traffic laws. a number of cities are