Well, it's only poisonous if you don't dry or cook it properly... and by "poisonous" I mean that you might throw up, or get indigestion the next day, or get sedated. It's not dangerous unless you really screw up, on a regular basis, or for small people to take a massive dose. With a $60 dehydrator and about 12 hours these mushrooms are ready to go! But yes, if you're not sure what you're doing, don't do it.