Purchases ≠ Preparedness
That's probably the last thing you'd hear from a retailer selling preparedness items, but it's true. Don't confuse your purchases with preparedness. Guns, knives, clubs, sticks, rocks, alarms, don't work by themselves.
Remember the saying "Guns don't kill people, people kill people"? You need to take action and train, so you can take care of business when the time comes.