Mark Zuckerberg's sister Randi accidentally shared a private family photo, apparently confused by or unable to grasp Facebook's privacy settings.
How's that for the definition of irony?
Randi Zuckerberg, the former head of marketing for Facebook and the executive producer of Bravo's reality series Silicon Valley, posted the above photo on Facebook.
The candid family picture is of Randi and her family (including sister Arielle Zuckerberg and Facebook CEO Mark Zuckerberg) reacting to the new Poke app.
The problem arose when Callie Schweitzer, director of marketing and projects at VoxMedia, saw the photo on Facebook, but posted it publicly on Twitter.
Randi was not happy.
"@cschweitz not sure where you got this photo. I posted it on FB. You reposting it to Twitter is way uncool," Zuckerberg said in a tweet to Schweitzer.
"@randizuckerberg I'm just your subscriber and this was top of my newsfeed. Genuinely sorry but it came up in my feed and seemed public," Schweitzer said.
Randi then replied that Schweitzer could view it most likely because she was also friends with Randi's other sister, so she could see tagged images of her.
Randi later deleted her original tweet to @cshweitz and also asked her to delete the tweet she posted with the picture of the Zuckerberg family.
Schweitzer kindly obliged, but the damage from Zuckberberg's mishap was done.
Randi also appears to have deleted most of the back and forth between herself and Schweitzer, but later posted a telling comment about the incident.
"Digital etiquette: always ask permission before posting a friend's photo publicly. It's not about privacy settings, it's about human decency," Randi Tweeted.
Or don't post it at all if you're not clear on who can see it.