"*Points cocking gun at you* Boom boom boom boom boom. Someone asked me about shooting up buildings. That'd take a lot of work. I want you to think about working smarter not harder. You can take a humidifier and fill it with gasoline and set a timer. With a candle or some kind of ignition device on the other side of the attic or crawl space. So by the time the fumes reach the other side of the attic or crawl space there's enough gasoline that *WOOSH* to vaporize the building. You can get into the attic or crawl space during off hours. Right, and set the timer for peak hours so nobody knows you were ever there. *Points cocking gun at you* Boom. You think about it. Running around a building shooting everybody up. That's a waste of time. Right, but putting a vaporizer or humidifier full of gasoline in an attic or crawl space during off hours..." Martin Cabello