The pinmarklet is a gateway to easy copyright-infringement.
Pinterest says so.
Once installed in your browser, the “Pin It” button lets you grab an image from any website and add it to one of your pinboards. When you pin from a website, we automatically grab the source link so we can credit the original creator.Not a single word educating the users about copyrights, or how to find images from the creative commons. Users are entreated to GRAB ANY IMAGE from ANY WEBSITE. That's it! Pinterest even implies that's it's OK since they are crediting the originator.
Can Pinterest hide behind the safe harbor provision while giving its users a tool to infringe on copyrights, telling its them outright to go forth and use it for illegal activity?