Mark Zuckerberg, Facebook CEO and founder
Even Mark Zuckerberg's family can get tripped up by Facebook's privacy settings.
A picture Zuckerberg's sister posted on her personal Facebook profile was seen by a marketing director, who then posted the picture to Twitter and her more than 40,000 followers Wednesday.
That didn't sit well with Zuckerberg's sister, Randi, who tweeted at Callie Schweitzer that the picture was meant for friends only. Schweitzer replied by saying the picture popped up on her Facebook news feed.
Randi Zuckerberg eventually said Schweitzer was able to see the picture because they had a mutual friend. Those tweets have since been taken down.
Many people reacted sharply to Randi Zuckerberg, saying that her brother's company makes privacy settings hard to navigate.