If you thought Facebook's privacy settings were a headache, you aren't alone, Randi Zuckerberg, sister of CEO Mark Zuckerberg, found out the hard way just how tricky those privacy controls can be. Randi Zuckerberg did what many people do, shared some photos. Her intention was to only share the photo privately, however, it was widely seen on Facebook and when someone else posted it to Twitter, the photo went viral. According to Marketing Land , Randi Zuckerberg took a photo of her family testing out Facebook's new Poke feature; she then uploaded the image of her family to Facebook, with the intention to only share with her friends. However, to her dismay she learned that a woman named Callie Schweitzer saw the photo, but then shared it on Twitter. So how did Schweitzer see the photo? What reportedly happened was Zuckerberg set the post to private, but she then tagged everyone in the photo. That meant that friends of those tagged would see ...