Automated copyright infringement for profit
Pinranker is a software that allows you to spam the pinning daylights out of Pinterest. Simply highlight a radio button to grab random images from Google, Yahoo, Flickr and even Youtube videos based on the search query of your choice, and Pinranker will automate pins, repins, and embed your Amazon affiliate code (not sure why, since Pinterest is stripping them off).
Copyright infringement is now automated via spambots, thanks to Pinterest. Oh, what a beautiful thing you've "created," Ben Silbermann.