Facebook founder and CEO Mark Zuckerberg Is the subject of a number of personal papparazzi-style photographs published by Gawker, a US media blog. Gawker has claimed the photos were taken in an effort to emphasize concerns about user privacy on the popular social networking site.

The blog used a photographer who tailed Zuckerberg for a weekend around Silicon Valley, taking photos of his daily life. The photos shows him with his sister, girlfriend, and friends, and also repeatedly checking his iPhone.

Gawker's photos comes after another privacy-related incident in which account details of more than 100 million of Facebook's over 500 million users were made public and became downloadable through torrent sites on the internet. The information was harvested from publicly available data about Facebook users.

Gawker blogger Ryan Tate wrote on the site that ""Facebook's CEO doesn't seem too preoccupied about your privacy, or about ours.

"Likewise, we weren't bothered by the notion of tailing him around the Valley for a few days, or about sharing the experience with you. Enjoy."

Facebook has struggled with recent public backlash about its frequently changing privacy policies.

Tate equated the Gawker photos with Zuckerberg's company's privacy actions, also writing about the 26-year-old, ""If it feels a little naughty to take such a close look into Zuckerberg's life, remember that this is the executive who pushed the private information of Facebook's hundreds of millions of users progressively further into the public sphere."