They'll show up for one week after a mass shooting, then they'll get bored and go back to their jobs and lives.
As far as the Ukraine, we are getting our money's worth. Putin is getting an atomic wedgie and it hasn't cost one American life.
It's not something that ever should have been a "right". Frankly, I don't feel any safer because we have millions of nuts out there with guns. We have to live in a world of active shooter drills, security doors, metal detectors, armed guards, kids going to school with metal backpacks, and militarized, trigger-happy cops because some idiots felt that a badly worded militia amendment mean an unfettered right to a gun. That's just crazy.
The 18th century, a well-regulated militia made sense, because guns were expensive and only men of means could get them.
Today we have professional armies and police forces. We don't need a bunch of twits to show up with guns when there's an emergency. And when mentally deranged people like Holmes or Lanza or Hale can get a bunch of guns, it makes us less secure, not more.