But they could easily opt out with robots.txt. They want to have their cake and eat it too. They want the free traffic from search engines AND want google to pay them for the privilege of bringing them traffic.
Granted, I have `disallow: /` in mine because I don't want my stuff scraped, but I still see Googlebot sometimes, and others, try to crawl my site.
It's not a very effective opt-out, because it requires the 'attacker' to honor the file's settings.
Feel free to enable it on your own server and watch the logs for a few days after sharing some links.
I hope daddy government treats you well.
Count on Big Brother to save you, and they will beat you down when it's time as well.