The author's biggest pet peeve is the Pinterest Police. According to this misguided blogger, Pinterest must be actively searching for copyright infringement, and is harassing poor pinners that don't properly credit their sources.
When pinning, please try and find the original source for credit.Hey, Pinterest doesn't care.
Legally, we're supposed to ask for permission from the photographer.But clearly no one does - burdening artists and photographers with a never-ending chore of finding their content on Pinterest and writing take-down notices. Please stop pinning without permission especially since you know it's wrong.