This panic over Pinterest is ridiculous. Why wouldn't photographers want their images shared with credit attributed to them? Isn't that the whole point, especially if they make them public in the first place?
http://www.pdnonline.com/pdn/news/Morel-Wins-Pre-Trial-1388....
And you can do either of those methods via deep-linking or copying. Even if use A doesn't copy it's still wrong. But I don't think many people will argue that use B is wrong if it doesn't copy.
Most photographers who publish on flickr have a keen interest in their stats: how often their pictures have been viewed etc. With pinterest, the flickr stats do not reflect reality anymore. Thousands of users could enjoy and share the image on pinterest without the author ever knowing about it.
No image on the web is safe from copying, but I find it strange that pinterest makes a copy of the image and chooses to show it without clear, evident author attribution (including the "All Rights Reserved" notice, if applicable) when Flickr allows hotlinking and provides an easy api to pull the author and license information.
It should be noted that while it's the right thing to do, and that it would be in Pinterest's best interest in the long run, no one has held Reddit or Metafilter or any similar site to such a standard. Artist attribution on Reddit has always been enforced by the community with less-than-stellar results.
What's interesting about this situation from a social point of view is looking at the differences between a Pinterest pin and an Imgur upload.
What makes the connection between pinterest and flickr so interesting to me is that (if I remember correctly) A THIRD of pinterest images come from flickr, and pinterest thrives on using flickr's awesome repository of images against the law and the spirit under which most of the images were uploaded.
I believe I know why they are not hotlinking... if they did, they would immediately get a sh!!load of complaints from flickr authors about their images being used that way. (As anyone can attest who ever hotlinked flickr images on their sites, even WITH author attribution.)
If I were flickr, I would implement a feature "Your image has been pinned on pinterest!" with a notice that the views on pinterest will not register in the flickr stats, and allow the author to send a take-down notice to pinterest by pushing a button.
I think Pinterest has managed to attract a different crowd from Reddit/4chan. For Pinterest users, it isn't so important to know that at any moment you can retreat behind a cloak of anonymity, whereas Redditors and 4chan users regard it as a fundamental human right.
I'm glad you commented though, I agree with what you're saying and I had no idea about flicker users having a history of people pulling their stuff. That definitely changes the game.