So. Last year, TV historian Mary Beard went on The Jeremy Vine Show on Radio 2, to talk about the abuse she'd received online.
So Mary named and shamed the guy who'd sent that tweet.
He turned out to be a 20-year-old from a wealthy family, who'd gone to public school and was a student at Nottingham.
He immediately apologised and deleted his account – Mary deleted the retweet, but not before half of Twitter had, not without good reason, given him hell. His story got covered everywhere, so every time you Googled his name, people saw what he'd done. Lesson learned.
But what's awesome is what happened next.
And as she explains, this isn't the only time she's done something like this. She helped another guy out on email who'd previously told her she was "evil", and tells the magazine: "Now when I have a bit of Internet trouble, I get an e-mail from him saying, 'Mary, are you all right? I was worried about you.'"