I wasn't equating Uber with unregistered and uninsured vehicles. I was simply pointing out that even those who support these services based on "free market" principles recognize the need for regulation on some level.
Personally, I think Uber is eventually going to disappear. There's going to be a huge public outcry against it once you have large numbers of illegal immigrants among the drivers, undercutting American citizens who simply want to earn an honest living.