You know those little green-and-white USDA Organic labels you find on organic produce? What if someone told you that their adhesive transmits a powerful drug into the edible that over time can render humans sterile? It’s true, they say; they’ve seen the lab reports, and go on to assert that this is a plot by USDA and agribusiness interests to decimate nutritionally savvy people as a way boost sales of poison-laden GM food products.
Insidious beyond belief, you think. You’re pretty sure it’s a crock, but your doubt gene says “What if…?” and you decide to check it out. You email people to ask if they’ve heard it and some of them do the same. Someone finds a truther blog with a long discussion thread about it and lets you know. Alleging scientific credentials, certain discussants proceed to hypothesize about the chemistry and physiology of the attack vector and argue about that. Others point to connections between certain USDA political appointees and Big Food. The rumor has become a thing, and even if you post refutations that get shot down, you’re now part of it.