Going one step further, I removed my websites from the Google index: https://lucb1e.com/?p=post&id=130 If you want to find my stuff, you now have to use DDG or some other search engine. Hopefully we can signal to Google that we are not okay with monopolistic behaviour (that's why I blocked them, not just for being the biggest or monopolist, but for also behaving like it -- see the blog post for details).
that's an awesome idea! how do you determine which IPs are the google webcrawler, though?
If you need to make sure it's actually a google bot when a client shows up with the user agent, you can use reverse dns: https://support.google.com/webmasters/answer/80553