Boingboing just posted about the Karen26 video stunt, so we can probably count on another mob calling for someone to get fired.

Recap: Ad campaign (this was a teaser) created by Grey. Seeded Goviral and paid for by Visit Denmark. In the end Dorte Kiilerich, CEO of VisitDenmark resigned, as the ad cause such a backlash in Denmark. Backlash was spearheaded by Extrabladet where the journalists had initially fallen for the stunt hook line and sinker.

Our posts on the story:
"Karen" the Danish mother seeking is actually Ditte Arnth
A quick chat at the kitchen table: Bambusing about Karen26 & Extrabladets need to shift blame
Not quite done with Karen26 - this what you did wrong Grey and GoViral.
Karen26 on The O'Reilly Factor FOX News last night

...and, since it was such a fantastic failure, it ended up on our Top Ten Marketing Mishaps in the past ten years list.