Bookmarked:
This is not the first report of how social networking sites run opaque “research” experiments on their users, and it is not going to be the last. But turning the users of your service into lab rats without them being aware of it, with potentially life-altering outcomes
[…] the changes made by LinkedIn are indicative of how such tweaks to widely used algorithms can become social engineering experiments with potentially life-altering consequences for many people.