That's how one Canadian potato farmer on Prince Edward Island describe food terrorists who sneak into the fields and stick needles or nails into young potatoes - which are concealed as the tubers continue to grow. At present, the Price Edward Island potato board is offering 500,000 loonies for information leading to a conviction (roughly $400,000). The main industry - if you want to call it that - on the island is potato farming, and it's worth about a billion dollars annually.
Perhaps they should invest in (if not surveillance equipment) metal detectors.