Privacy and free data / data portability are in tension. If we're friends on Facebook, you decide to switch to Google+, you import all your friendships/etc from

Privacy and free data / data portability are in tension. If we're friends on Facebook, you decide to switch to Google+, you import all your friendships/etc from Facebook onto Google+, isn't that an invasion of my privacy (disclosing information about me to Google+)? The free software movement doesn't have this inbuilt tension.