Except in San Francisco, New York, Chicago, Washington DC...
I dunno about you, but I wouldn't live in the places you named. The closest I ever came was living in NoVa for 3 years against my will. I was pathetically happy to make good my escape....and here, not only would the police and the CA not arrest or prosecute in a situation like this, they'll "sign off" on the Form 4 to let you buy the heavy artillery necessary for proper "home defense".
Q: "why do you need an anti-tank rocket launcher?"
A: "In case I need to take out some kind of LAV (Light Armored Vehicle) for home defense."
Response: "Oh, OK. Here ya go."