Google+ Shared Endorsement's - probably everyone should turn them off
Google recently introduced "Shared Endorsements" which means Google will repurpose your Like's in advertising. In other words, while showing an advertisement, the ad might show "So-and-so liked this" using data derived from your Likes or +1's on Google+. This could be helpful to someone browsing for a product to see that their friend liked the thing. That might influence a buying decision, right?