Anna Netrebko discloses in an interview that she's happy without a computer, and wouldn't know how to turn one on. In fact, she's never looked at her own website.
She told the Kronen Zeitung that Erwin Schrott googled her once and came up with "Netrebko has got really fat and has no voice". After that, she realised it was better to avoid computers altogether.
She's advised her Twitter-addicted blogger of an other half to do the same, because it exhausts his energy when he get angry at what's been written. Good advice for all singers (and opera directors) I think.