Earlier quoted context omitted.
This is probably a reaction to the news that Facebook is now officially tracking non-users to create shadow profiles and serve adverts to them off Facebook itself. I think it's the serve-adverts-off-Facebook-itself part that's the actual news; all of the moderately chilling tracking and profile construction was of course happening already. http://www.theverge.com/2016/5/27/11795248/facebook-ad-netwo...
And yet, Google started going down a similar path since December 2009 when they introduced personalized searches for non-logged-in users and nobody tries to block them.
This is factually incorrect. Just because you haven't personally seen people block Google domains doesn't mean those people don't exist. I've blocked many Google domains for a long time. Not only was GA the first domain in my blacklist, it's also the domain that many of my non-technical friends/family wanted blocked.