My lipos all live in the house, in the trucks, in lipos sacks, on the side, in Jiffy bags, on top of the pc etc. etc.
Dead ones go in the back garden.
My understanding is that they only let the dragons breath out while on charge, in use or if damaged (the same as any other chemistry). Before being bought they are stored in warehouses in bubble wrap in cardboard boxes.
I do have a fire extinguisher in the kitchen between me and most of them though just to be safe.
My two pennies worth 🙂