Psychoactive (magic) mushrooms have that property too but some are only damaging if you eat more than a kilo.
If you are crazy enough to go picking, I recommend trying no more than 1 gram of any unknown mushrooms the first time. Maybe 5 grams the next day if you didn’t feel sick. Otherwise you might be in for death. Or a free trip to the moon.
Notice the wife in one of the stories ate some she picked and died. While the husband survived after only eating a small amount.
Y’know what, you are right, the purple indication was for psychoactive ones...not necessarily the toxic ones.
Agreed, you’d have to be nuts to pick your own, especially considering the amount you’d use in a typical food application. (a FOOD application?) Geez, I better get off the ‘puter & go to bed.
Never ever eat any mushroom that you have not positively identified. Eating even 1 gram of either the Destroying Angel or the Death Cap will be enough to destroy your liver and kidneys and the onset of symptoms might take two or three days to occur.