Oh, puhleeze!! Do these citiots think cows aren't eating any bugs when they graze ... or do they think Bossy picks them off the blades of grass first, then puts them through a salad spinner? How about the bug/frog/turtle/rabbit/etc. poop that's on the grass, or the soil that the grass grew in? I've had to wash bird poop off my apples and tomatoes numerous times. Do they think the ones in the produce section at the store were grown in a hermetically sealed plastic bubble? Oh ... and, let's not forget pigs, catfish, lobster, and crabs! Then, of course, there's my personal fave: farm raised fish and shrimp!! Ye gads! They're raised in what amounts to a sewer; especially those from Thailand and China. Toilets are cleaner than those tanks. Yucko!
Throw some of these factoids at them, and they'll starve to death.