[tokyoSurfer]

It also depends on where you look for them. In Europe there is only one mushroom you can pick by mistake. The way to check if it is dangerous (and not really that much dangerous) is to lick it. If it has strong sour taste it is bad (licking it won't get you sick, you need to eat it whole). Most of the times people make mistakes when picking bladed mushrooms that are not even that closely looking as the eatable one.