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Women and young adults are more unfriendly than men … on social networks, that is.

Or at least that's what a  new study released today by the Pew Research Center reveals. According to the report, two-thirds of Internet users are on social networking sites and a good chunk of them - 63 percent - have deleted "friends."

And not only is de-friending up from 2009 by 19 percent, but women and young adults are the ones hitting the "unfriend" button the most.

"Some 67 percent of women who maintain a profile say they have deleted people from their network, compared with 58 percent of men," the Privacy Management on Social Media Sites report states.

Unsurprisingly, young adults (those between 18 and 29) are more apt to delete contacts than users between 30 and 49.

While women are more aggressive in pruning their friends lists, they are also more stringent when it comes to protecting their information on social networking sites, says Pew.

More than half of social network site users (58 percent) say their main profile is set to "private" so only their friends can see it, and women more often choose the "highest restriction" (67 percent of women versus 48 percent of men).

The study is certainly noteworthy from a gender perspective, but some other fun facts are included: 11 percent of social network users have posted content they regret, and half of users have "some difficulty" using privacy controls. The full report can be found here.