They do have that option. The photos they are protecting have that option set. On their settings page: http://www.flickr.com/account/privacy/ http://www.flickr

They do have that option. The photos they are protecting have that option set. On their settings page: http://www.flickr.com/account/privacy/ http://www.flickr.com/account/privacy/ They have a setting that says "Allow others to share your stuff". If you have marked it No, it cannot be shared to Pinterest. Seems pretty straightforward to me.