Privacy has never been a strong suit for either Facebook or Google, but the Circles feature on Google+ is a simpler way to categorise groups of friends than is available on Facebook. Users are given the option of which Circles of contacts to share a piece of content with, each and every time they post something. Google has today been able to bathe in the rare warmth of widespread praise for its approach to privacy.
But this is a beta and there are going to be bugs. One appears to be in Google+’s “resharing” feature, which works a little like a retweet on Twitter or reblogging on Tumblr.
Say a close friend of mine posts a picture of her kids to her “friends” Circle. With the “share” option on every Google+ post, I can reshare this with absolutely anyone, from another Circle to which my friend does not belong, right through to making it completely public. The same loophole applies not just to photos but to any kind of post, as far as I can tell.