Double-cream pays a visit: the foes of data storytelling take aim

The stage lights go up, the cue is given, and the much-anticipated DataStorytelling strides in from stage left, and the spotlight focuses. Then from somewhere outside the light a pie lands on Storytelling's face. Whipped cream flies everywhere, and the curtain falls.

Who could have done this? The audience murmurs, and backstage the crew stare at each oth…