In April 2011, UK-based illustrator Mr Bingo started a hate mail service where he’d decorate postcards with offensive messages (e.g. ‘You are a loser and you have a fat back) and post these to the designated recipents. It was such a hit that he had to temporarily close the service after six days. He eventually did 400 hate mail postcards and ended up publishing 100 in a book. We love how hilariously petty and irreverent these are — and there’s not one ounce of spite in them.