The story about the guy eating cans of cat food reminded me of a cat treat commercial from a couple years ago (I can't remember what brand of treat). In the commercial, a guy was eating a "snack food" and going on about how wonderful, crunchy, and meaty it was. Then he said, "But there's one thing I don't understand. Why is there a picture of a cat on the bag?"
Anyway, as far as people eating pet food - Back when I was first trying to get my bird to eat his pellets, I read that eating a food or pretending to eat a food in front of your bird will often entice him to taste it. Pretending to eat the pellets wasn't fooling him, so I actually ate some. It worked, but then he spit the pellets out, lol. I thought they tasted okay!