4. Revenge Feces
flickrThey call it a gag gift, but there's nothing fake about the contents of these packages. Senders, who are promised complete anonymity, can choose between cow, elephant, and gorilla waste, or a combination of all three. To add some class, each package contains a business card stuffed right into the middle of the animal mess. The card beckons unsuspecting recipients to turn it over to see who sent them the putrid awfulness laying at their feet, forcing the person to actually touch their "gift" if they want to know whodunnit, only to be told "We'll never tell!" This is an actual thing people do.