Vice President Joe Biden gave self-defense advice that is illegal in some states and would also open the person to danger.
“You don’t need an AR-15—it’s harder to aim, it’s harder to use, and in fact you don’t need 30 rounds to protect yourself. Buy a shotgun! Buy a shotgun!”
“I said, ‘Jill, if there’s ever a problem, just walk out on the balcony here, walk out and put that double-barrel shotgun and fire two blasts outside the house'”
Felony aggravated menacing, reckless endangering charges could result from shooting gun in air
Also, walking out on the balcony and firing warning shots without knowing where possible intruders are simply tells them where you are and gives them a clear shot at you.