Toadstools

Most days I walk through a wooded area on the outskirts of our town. Recently I've noticed a new phenomenon; small groups of foreign nationals, eyes fixed to the ground between the trees, filling Dunnes Stores and Lidl bags with toadstools. I've no idea what they'll do with them. If they're for gastronomic purposes all I can say is bon appetit; if they have other uses, is this any different than what we natives do with alcohol?