flying cars post 9/11? I don't think so

As if car bombs aren't bad enough, flying car bombs would be much worse. Imagine a flying-car load of anfo (with proper detonators and the like) crashing into a building. This has nothing to do with technology, but with security. If everyone has access to heavy (OK not hummer weight, but still heavy) flying machines there is a potential for causing huge amounts of damage. Outside the USA people take a dim view on allowing just anyone access to heavy weaponry. It is for just this reason that hobby rocketeers are not allowed to put a guidance system into their rockets (changing them from mere rockets into missiles).