I worked at Home Depot for five years, and I always thought their ‘no weapon’ policy was ridiculous, because there is something in every aisle in the store that can be used to kill someone.
I also think of things like because of our strict OSHA and EPA laws that by mixing some solvents together you could shut down a store for days or weeks. Better yet just take an old mercury switch and smash it on the ground and turn the store into a EPA Superfund site.