There are so few out there who are capable of utilizing the potential of a liter bike and fewer still, on the street, who ever go fast at all on them - except in a straight line. In my old neighborhood on the Lower East Side - I know of five guys who live within a 7 block radius, all of them overweight dimwits - who currently do all their rolling - in electric wheelchairs, paralyzed in really stupid accidents. Not one of them ever rode a small bike. They all went out and bought GSXRs or Hayabusas as their first bike.
I'm not a person afraid of big bikes. I've owned my share. I had an R6 and finally sold it. It was wayyy faster than my GPZ1100 or my Ninja from the '80s. I understand the temptation to go to a liter bike - for the sake of roll-on, but really, if someone is concerned about highway riding, get a BMW all nicely geared for highway touring. And you can get 650s that are geared for that too. The R6 was very buzzy at highway speeds and the highly tuned sport-oriented liter bikes are not much better in that regard. I've ridden Jap liter bikes and while they're fun on a good road with wide open turns, they kind of suck in the tight slow turns because they're so freakin' heavy. And on the highway... they pound your ... black and blue after an hour.
Don't know about other states, but in NY getting a motorcycle licence is much too easy. Read up sometime about how challenging it is to get a licence even for a small bike in Japan. We really need that here.
I don't think liter bikes should be banned or anything stupid like that, but riders should have to pass a test to show they're capable of riding them.
I've got a DRZ440sm and love it and actually thinking of getting a Honda CRF 250L too. My wife and rented two year before last and rode from Hanoi up to the Chinese border and back. Really awesome bike. Rode them in the cities, highways, up through the mountains and through fields and rice paddies and really fell in love with it.