incrediBILL - 6:34 pm on Mar 28, 2012 (gmt 0)

They have to come up with a way to opt out entire websites.

All you have to do is add some anti-hotlinking code into your .htaccess file that blocks all Pinterest referrers and/or sends them an image with a message like "I'm sorry, example.com does not allow linking from Pinterest".

Work smart, not hard, as chasing image hotlinks with DMCA is silly when 3-4 lines of .htaccess code permanently stop the problem.