Sure there are, they just have to not eat what they picked up.
Source: friend's mom once gave food poisoning to the whole family by serving them an omelet made with mushrooms she found, but didn't eat it herself. Fortunately it was merely mushrooms of the "fucks up your stomach" variety.
In his story, his friend's mother boldly picked mushrooms from her backyard, cooked them into an omelet for the family, but DID NOT EAT the omelet herself.
Nothing would stop her from growing old while continuing this pattern of bold collecting, although a stint in prison might make for an earlier retirement than expected from the foraging scene.