Here’s a way to offend your friends: send them an e-mail with just the word “UNSUBSCRIBE” in the subject line and no text in the body, like you want to unsubscribe from ever hearing from them again.

So far, none of my friends have been offended. I don’t think they get the joke.

It’s still funny, though (I recently had the epiphany that if I say “I’m so funny,” it makes whatever I’ve just said that much funnier — to me, anyway).