I think that if authorities came busting in door-to-door to confiscate peoples stuff, then pretty soon those same authorities would be having to worry about getting THEIR stuff confiscated by those same people. People might have been caught off guard by the authority-sanctioned gun thefts during Katrina, but now that it's well known what they did, I doubt the citizens of the US will allow it to happen again. More likely, it's the authorities who will be staring down the muzzle and losing their weapons should they try that stunt again.