When Thoreau came inside after swimming naked in the pond, and capturing a frog for dinner, he was surprised to see more than 100 comments on his Facebook posting. “Fried rat!,” said one comment, “you better get yourself to a doctor now. You will have parasites and worms in the morning.” There were more than 20 comments from animal lovers horrified that he had eaten a cat, and there were warnings about berries, queries about the mushrooms, and questions from environmentalists about whether he had eliminated in the woods, properly disposed of the carcass. He was cautioned about drinking water that wasn’t boiled, and told that he might freeze if he didn’t dress more warmly in the winter.