Facebook founder's sister tripped by privacy settings

SAN FRANCISCO (AFP) - Facebook co-founder Mark Zuckerberg's sister evidently tripped on the social network's privacy settings, landing in the midst of a debate on Wednesday about "online etiquette."

Randi Zuckerberg, who launched a Silicon Valley themed online reality show after quitting her job handling Facebook public relations, kicked off the controversy after a family photo intended for friends went public.

The picture, copies of which were at Buzzfeed.com and elsewhere on the Internet, showed Mark Zuckerberg in a kitchen with family members dramatising reactions to messages sent with a freshly launched "Poke" feature at Facebook.

Poke lets people send messages that self-destruct in what is seen by many as a spin on popular smartphone application Snapchat. Some have joked that Poke is a boon for "sexting" risqué pictures because senders can have them quickly erased.