A content filter plugin, that allows me to block content semantically. Every year I feel the net gets swamped by certain events which affects my browsing experi

A content filter plugin, that allows me to block content semantically. Every year I feel the net gets swamped by certain events which affects my browsing experience. Halloween and the Superbowl are fairly regular, or the football world championship. People on facebook, imgur, twitter or 9gag and so on then just can't shut up about it. I would like to take notice of a new image of Pluto and then click "seen" and have the similar pictures blocked on imgur, twitter and news sites. I would like to have this as a browser feature that I can control and easily change, rather than just a plugin. Adblock Plus would be a similar idea but I wish I could automatically teach it to block even more.