I think (1) is already somewhat true, unless they changed a rule recently. I flew in 2006 out of Boston Logan with a friend who had forgotten all of his identification (save his boarding pass and maybe a college ID.) You can bet they frisked him and patted him down to high heck, but he was still allowed on his flight.
Same report by a friend who flew with an expired driver's license (unrealized until he got to the ID check). They did pull him aside for further questioning and more thorough screening, but he was ultimately allowed to fly.
