Because it's not neccessary, they clearly didn't mean anything, anytime, anywhere, and nobody but a insane fanatic would ever think they did.
If you are going to say anybody can have any arms anywhere under the 2nd ammendment, how about a nuke? I like nukes, they are fun. I want one to keep in the trunk of my car just in case the Chinese ever invade, so then I can take out a whole battalion of them. And if I accidentally set it off when I get drunk in downtown New York? Oops. Sorry. There goes 20 million people.
That's clearly idiotic.
This is nuts. I'm not for registering guns. I'd favor overturning all the loopholes you have to go through to get a handgun. I'm against the so-called 'assult weapons ban' and I cheered when the congress let it die. I think the so-called 'gun show loophole' is a GOOD thing, not a bad one, and I wouldn't favor overturning it. I even DO think that it's OK for certain people (i.e. emotionally stable, careful people with good backgrounds) to own rocket launchers and tanks and stuff.
But give me a break! I'm somehow anti-second ammendment because I don't think that anybody should be able to walk into a store and buy anti-aircraft rockets? That's perposterous.
No, that's the price of freedom.