If a pic has the pin it button (like some of the ones here on HubPages), are you allowed to pin it to Pinterest? Is that an invitation to pin the pic or do you have to personally check it for possible copyright violations? If a photo has been pinned to Pinterest, are you allowed to repin that without worrying about possible copyright issues? If you use a Creative Commons or Public Domain pic on your article & add text to it (photo credits included at the end of the article), are you allowed to pin it to Pinterest & have it link back to your article? Or should it link to where you got the pic?