The only times they get away with that with our kinds of people is when we are outnumbered and setup, then are facing at best 10 to 1 odds (often as high as 40 to 1) under circumstances where we are caught by surprise.
Under circumstances where there are a dozen of us determined to fight for a particular zone of control good luck with that one.
Now whether or not they would legalize having FEMA managers and a few guards take supervisory control over the Walmarts and some food processing plants; I think the main idea has been to prevent corporate price gouging on basic commodities, not going door to door and emptying pantries.
Now as for stubborn old Farmer Jack or Rancher Rick, deciding that he is not going to allow anyone to empty the grain silos or haul the cattle out without first payment in gold bars, at his price gouge demand level, if he does not have a hell of a lot of backup, then yeah, the old man and his shotgun will he the speed bump between the food convoy and the tactical teams whose job is to make sure the food deliveries happen, regardless of any objections. That's where you get into a couple of those scenarios like we saw in Jericho. That's a community defense, not some greedy rancher deciding that he wants five ounces of Gold per cow plus a hundred ounces of silver for the food convoy to travel on his right of way to get water and expecting to play victim with a rallying cry when he does not get it.