People make threats all the time. Sometimes they’re just jokes, but every now and then, they actually follow through. In the case of a woman from Redondo Beach, California, she just wanted some pizza and ended up getting a threatening four page letter on how someone wanted to rob her!
The woman ordered the pizza and had it delivered through Postmates and when she didn't give a tip to the driver, he totally lost his cool. He ended up writing a short novel to her, talking about how he was going to rob her since she didn't leave a tip. Either he is a broke, desperate college kid, or a total moron.