Some interesting discussions on TN, and a friend posted this one of my fb groups--this blog gives a good overview of the issues associated with possible copyright infringement by Pinterest users. From what I gather from another article (will link if I can find it again), Pinterest has covered their ass in regards to people misusing or not crediting pins but it's entirely possible that users *are* in fact infringing on copyrights by not quoting sources or summarizing the entire recipe/tip/information on the pin itself. Interesting stuff I think. 
<Clicky article>ETA added the link to a good post on Money Matters on TN. 
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