Well, you can debate the finer points of pinning and linking with her, since she's the one setting up the rules for her site. She has advertisers on her site, and she doesn't make money if her images are seen on Pinterest instead of her blog. So she prefers that you simply give a URL link for people to see her quilts, instead of a picture of the quilt itself. I certainly don't begrudge her for trying to make money any way she can from her talent.
She DOES have pinning disabled on her site for all her copyrighted images, so when someone tries to pin, the picture is grayed out and a message is displayed that says that image cannot be pinned.