You left out those evil 5 gallon propane tanks. Some twisted POS loaded the trunk and back seat of his car with a bunch of full propane tanks and waited for the kids to leave the front of a high school where my wife once taught in an attempt to blow up the front of the school and the kids as they left the building. Luckily for all, it didn't go off .... otherwise I am sure that propane tanks would now be banned .... or only sold / refilled to adults 21 years or older!
Exactly. There is always a way. Did the IRA stop their terrorism just because they couldn't own guns? (Answer: Boom!)