You get an email from a friend, with a link and a message: “Hi! Oprah says it’s excellent!” But did your friend really send this message? And what’s so excellent? Millions of people got emails like this one, but not from their friends. Instead, according to the FTC, marketers hired by Sale Slash sent spam emails from hacked email and social media accounts. Why? To trick people into thinking the messages came from a friend. And, of course, to sell stuff.