Over the past month or so we‘ve written a few times about security research Justin Shafer. As you may recall, he first came to our attention, when the Justice Department decided to subpoena the identities of five Twitter users because Shafer had tweeted a smiley emoji at them. No, really. I‘m not exaggerating. That‘s literally what happened. Shafer saw some Twitter users discussing a case totally unrelated to his own, tweeted an emoji, and the DOJ is demanding the identity of those he tweeted the emoji at.