Earlier quoted context omitted.
I think search engines need to realize the value of raising their results' quality by allowing users to tell them which sites they think are scummy.
Make it an easy-to-click report button and pretty much every site whose politics I disagree with will get a downvote... every article by a person I disagree with as well. The question is: how useful is that to the search engine, or indeed to myself?
If this happens to all sites, wouldn't only the poorer sites stand out? I don't see why one strand of politics would be significantly more likely to downvote.