“OMG!! I just saw the CRAZIEST video of you on YouTube! [URL]”

“Wow, 24 people are viewing my Twitter profile right now! Find out how many are on yours [URL]”

“I spent 167 hours on Twitter. Find your number now! [URL]”

Sound familiar? Make you shudder? These are the tweets of spammers, spreading once every few weeks through Twitter like a disease. But they’re also pretty compelling, and sound almost legitimate, especially when they’re tweeted from a friend’s account. And that’s because they have years, and years, and years of practice to get it just right.