Too dangerous! All it takes is one toadstool spore to pollinate the mushroom, and though it may look like the real thing and be the real thing, it would be poisonous.
The mushrooms we eat that we buy from the store are grown in mines, and you have to go through a decontamination room to get in from the outside. This ensures no foreign spoors get in. At least that's what I've heard.
Les