It's also worth noting that I saw the button in my GMail interface early this morning (as well as the little pop-up explaining it), and now, a few hours later, that button is gone, and it is still very much 1 April. I would think if the backlash was just part of the joke, the button would still be there.
Yeah, okay, that sounds pretty conclusive. When I replied, I hadn't yet seen a non-jokey-sounding report of a real person saying they'd experienced it. That sucks – both because the apparent negative impact on real people's lives and because I was really hoping it was an elaborate prank on the media.
