Eating shit can kill you..human feces contains e-coli and quite a few folks have died from it..
The Amanita thing is not a myth my friend..back in the days when people ate these things for their intoxicating effects the folks who tended to them (servants..slaves..whatever) used to catch the urine expelled by those who had eaten the mushrooms and had drank it for it's effects..
It's late so I'm not looking this up..but I know it's true because I have read a few texts with this..
Look up ancient rites with Amanita Muscaria (Fly Agaric) and look at how toxic these puppie are while you are at it..