Okay, first off: you should never send anyone hate mail. Unless you love them and it's funny. But even then - make sure they're in on the joke. No one wants to get mean stuff in the mail.
That said, if you are considering sending some affectionate and unserious hate mail, the bar has been set very high by London, UK-based artist Mr. Bingo.
Mr. Bingo says the whole project got started one night about a year and a half ago. He got drunk and decided to send a message to his social media network: the first person who responded to him would get a piece of artistic hate mail on the back of a vintage postcard.
A complete stranger named Jonathan Hopkins was the lucky (?) person who responded first.
Mr. Bingo wrote him a postcard that said "F*** you Jonathan, f*** you and f*** your s*** legs." It went over pretty well.
As word of Mr. Bingo's exploits spread, more and more people asked him for their very own hate mail. He ended up opening a custom hate mail service, and he's completed over 400 pieces since then.
The work is so popular that he's released a book.
It was published by Penguin Books, and it collects all the hate mail he's put together so far, showcasing the vintage images from the front of the cards and the artwork on the back.
At this point, he's so overwhelmed by demand that he's no longer accepting requests.
And if you're wondering why he's named Mr. Bingo, you can find out in the video below. It's a pretty great story. Actually, it's not a very good story at all, but the video is worth a look (warning: the video contains some very rude NSFW language in both written and spoken form).