I seriously wish this matures well like Adblock Plus. Imagine having a crowd sourced blacklist of domains and users can easily add it to the extension. (similar to easy filter based on geographic locations for adblock)
its mindblowing google hasn't done this yet
Clickable - https://chrome.google.com/extensions/detail/jiicbcimbjppjbck...
Some gravy on top would be an in-line blacklist button beside search results but even spending thirty seconds to set up the blacklist in advance gives you a Google that's a lot more useful than the default. Bravo, sir.
Stackoverflowerizer does a similar job by redirecting to the original content when user clicks on a similar website link.
https://chrome.google.com/extensions/detail/gledhololmniapej...
Giving spam reports 4x the weight compared to the sites that we autodetect is how we try to balance responding to outside feedback with spending our review cycles on the spam that impacts users most.
experts exchange and ehow need to be gone by now and the data will be incredibly useful for your search quality