I've started to notice several of my photos turning up on Pinterest without my permission. These are photos which I took myself, and which I have published on my own sites (with appropriate copyright notices).
I've read in this forum, and elsewhere, that getting postings on Pinterest is highly desirable for SEO purposes, and is something that webmasters should encourage.
So should I be grateful that someone has taken the trouble to post these photos, or should I try to get them removed?
On the one hand, posting these pictures is an infringement of my copyright. As soon as one person posts it, others "re-pin" it (that is, they copy it) - again without my permission. Furthermore, there's seems to be a general idea that photos on Pinterest are in the public domain, which in turn encourages even more people to copy them.
On the other hand, the photos on Pinterest have a link back to the original page on my site. Is that of any value? The links are nofollow, and - looking at my stats for the last few months - I have never received a single visit as a result of them (which isn't surprising; after all, if you were looking for a particular photo and found it on Pinterest, what incentive would you have for visiting the page that the photo was lifted from?)
Then again, I'm obviously not the only photographer in the world who is in this situation, and we don't hear of huge numbers of images being removed from Pinterest in response to take-down notices. So I must be missing something.
Any comments or advice would be appreciated.