Alex Hern, the Guardian:
From 11 November, Google will share users’ recommendations and reviews with their friends, in what the company is calling “shared endorsements”. […]
Users can opt out of having their picture and details used by changing a setting – but the default is that people are opted in to having their data used.
But as an alternative method of protest against the changes, some users have changed their profile pictures on Google+ to that of Eric Schmidt, the company’s executive chairman and former chief executive.