A moment ago, you were the master of your universe, and now you don’t even know which way is up. Your eyes are burning, it’s hard to breathe, and your fear starts to overwhelm you. You, your family and friends are now in imminent danger and you must act.

Along with the smoke, all rules go out the window.  Your morally justified in taking all defensive and offensive measures necessary to save yourselves and stop this threat in its tracks.