I don't think FB should be required to do this (I don't think they are but who knows what people will demand) nor do I think that Google should be forced to fil

I don't think FB should be required to do this (I don't think they are but who knows what people will demand) nor do I think that Google should be forced to filter these stories out of their search results etc. Ultimately the responsibility for judging news lies with the consumer of the news. It may very well be in the interest of FB/Google to apply a filter to serve the users the best possible results...but that's a potentially dangerous path. I wonder how viable it would be to provide these filters as a service (seems like large scale machine learning). There might even be a market for a "confirmation filter" where I can elect to filter out everything that is conservative/liberal if I so choose (since I hear a lot of people claiming media is biased in favour of the other side anyway). Spam filter 2.0 (or is it 4.0 theses days?)