And who decides who the responsible ones are, and who picks the ones doing the deciding?

The US government has classified me under an unsavory category, yet you will find no one I have ever harmed outside of service in the military. No have I done drugs, stolen anything etc. They just didn't like what I had to say.

I say rights can not be regulated in any fashion. If someone abuses them it is a tort they can be sued for. If the infraction jeopardizes someones life then the others around them can exercises the right of self defense or defense of a 3rd party and save the trial. Problem solved, no government regulation needed. That is responsible citizenship and gun control...