[mlinsey]

Flickr enables their users to mark their images as not-sharable, which now includes disabling anyone from sharing the images on Pinterest: http://venturebeat.com/2012/02/24/flickr-pinterest-pin/

Legally (IANAL but my understanding is), Pinterest only needs to comply with DMCA takedown requests. Instead they are being proactive and allow people to tag images as "nopin", vastly reducing the need for tedious or unreliable monitoring of Pinterest for copyrighted content, as content owners must do for almost every other sharing site. That's a good thing, and they should be applauded for it.

I suspect you might dislike the opt-out vs. opt-in nature of the nopin system, but new technologies have been accused of facilitating the death of copyright ever since the invention of the radio, but it turned out that most of those inventions created a lot of value for the world and for creators who adapt to the new medium.

[moe]

Legally [...] Pinterest only needs to comply with DMCA takedown requests.

That didn't work out so well for MegaUpload.

But then again, pinterest probably doesn't have a strong lobby working against it.

[marshray]

But part of the complaint against MegaUpload was that they were not complying with DMCA takedowns.