The hazmat fee is a scam. The little pack of pellets is far less hazardous than the big tank of fuel hanging under the truck. How many times has a jug of powder or pack of pellets inadvertantly exploded? Do some research and see. If homeowners insurance cares little about having it in your home, trust me, it is safe. The freight companies know who will pay their extortion, working men and women who will pay any price to enjoy their simple hobby.