You sad little man.
I'm sad that idiots like you exist.
The long and short of it is, when shit happens, it's better to be prepared than unprepared. Colin Ferguson was able to reload twice before people figured out that he wasn't going to stop and rushed him. One responsible person with a gun could have stopped him immediately. Anders Brevik killed 69 people, all disarmed and helpless.
I truly hope you never have to face that situation, but if you do, I hope that someone who isn't as fucking irresponsible as you are is on hand to save your smug, stupid ass.