Without the following (and the other standard drugs), I bet a few &9ers would....
Any product containing chemicals such as acetone, butane, fluorocarbon, methylene chloride and methanol, propane tetrachloroethylene, toluene, trichloroethane and trichloroethylene are all potentially open to abuse. Some can be found in adhesives such as glues and rubber cements; others in aerosols like hair sprays, paint sprays, deodrant sprays, fabric protectors or air freshners, or in cleaning agents such as degreasers and spot removers.
It may well be in solvents such as paint removers and thinners, polish removers, correction fluids, lighter and fuel gas as well as gasoline. Even fire extingusher containing bromochlorodifluoromethane is not spared. So is food like whipped creams involving the whipped cream propellant.
I am surprised a certain Freeper has not posted here that Cow Poop is a God given item and we should be able to do with it as we please. (including covering very fresh manure with a tin can on a hot day and drilling a small hole in the top to huff it, other methods include letting it dry and burning it and huffing the gasses produced in the burn process).
But the larger question is - Why do you care what some other idiot does with cow shit? I don't care if you sniff it, eat it, or make a cow shit hat out of it and dance the friggin' merengue.