Removal of pinterest from my site

I have got a photo site with PhotoPost PRO standalone software.

I noticed that everybody can pin up photo’s with pinterest on my site.
How can i remove/block this possibility

(Has to do with copyright of the photo’s)

Thanks for helping me out!

I think you need to take your question to the photopost people, as I don’t see what this has to do with Piwik and/or Piwik plugin development