If you have a flickr account with NO SHARING and all a copyright of ALL RIGHTS RESERVED . on your account .. BE AWARE that people can still send your work VIA EMAIL and they CAN GRAB THE LINK and post it wherever they like . .my work was recently stolen from there via this method and once posted on TUMBLER they can change the link back url so it will not go to your account .DO NOT allow any third party API .hide your work from public searches and and only allow your flickr contacts and friends to see it THATS IF YOU WANT TO REDUCE THE RISK of it being STOLEN..According to flickr NO SHARING . means you cant directly post it to facebook,tumbler or twitter or any other blog ..but HEY !HERE IS THE FUCKING LINK TO GO MANUALLY DO IT ..or EMAIL IT !