hotbox here as well, and for the suffocating thing, if they're only staying long enough to smoke a bowl i seriously doubt it, i have a gas mask and i'm willing to be that there is a shitload less oxygen in that thing than a garbage bag.....may not be the smartest thing in the world, but other than lighting the bag on fire i can't really see any danger in it (same as to the tent post, just don't want someone being cooked alive for the media to exploit)