Skype contact lists may have been exposed (2017)

As of a couple of days ago, the new Skype tells other people how many contacts you have in common. (I can tell because those contacts have the same last name, physical resemblance, etc.) So this can be used by stalkers, bullies, harassers, and people who wish to research someone and learn who they know. I went through and deleted some of my contacts by hand this morning (it takes forever… in a triumph of “good for Microsoft, bad for the user” they make it super easy for you to give them your social graph, and super hard for you to take it back).

Source: www.steverrobbins.com