If safety is the only concern, all RC flying needs be grounded. Period.
I don't see a difference in flying my hex to my Extra. If I'm stupid, I can hurt people. That's just a fact of life. Same goes with driving a car or any one of the many things I do during the day that could possibly injure myself or someone else. Eventually something really bad will happen with an RC toy. I can promise you that. Just like the dude in New York who slit his own throat with a RC helicopter last summer, stuff happens. Somebody will be a dumbass and bring down an airliner or something in GA eventually. It's a statistical certainty.
People in general are dumbass's, they have been since the beginning. No rule, nor regulation, or piece of legislation will change that. We accept certain things in the name of freedom, but some people are willing to give up their freedoms for the illusion of safety. Cue Patriot Act rant from our previous failure of a presidential elect....