[jqueryin]

Cool concept. I toyed with a similar concept on Pinterest when my wife got sick of seeing things for workouts, abs, core excercises, and the like. It's only a proof of concept bookmarklet and they may have changed up their source since I created it, but feel free to check it out and run with it:

https://github.com/cballou/Pinterest-Keyword-Removal-Tool

It searches for cards containing specific keywords and removes/hides the entirety of the card from the DOM so you don't have to look at it. It worked seamlessly with their infinite scrolling from my initial testing.