London-based illustrator Mr. Bingo discovered the joy in sending offensive (albeit well-designed) postcards to people when he first sent one to a friend. Instead of keeping all the fun to himself, he began a service where people could request sending these to whoever they want.
As you can imagine, there's a catch. You can't pick which card you send (the choice is random) and due to demand, it's now only available in the UK. However, 400 illustrations later, Mr. Bingo has made a book of these hilarious cards, allowing everyone to experience their sentiment without the surprise of getting one in the mail from a friend (or enemy).