I've had those conversations, too!
I love to laugh about it afterward but I HATE having to grin and bear it when someone starts prattling on with that junk.
Last month it was, "I saw a hawk, therefore, ALL of your chickens are doomed and they will be eaten."
Keep in mind this person has never raised chickens, but apparently they are an expert and I am just a dumb novice.
On a sidenote, how cool would it be to have a chicken that was about 4' tall, something so big you could walk it on a leash like a dog? Wouldn't that just scare the holy crap out of those people?