You can do the opposite since the inception of robots.txt: User-agent: * Disallow: / and then whitelist google bot and whatnot. Most of the web is already confi

You can do the opposite since the inception of robots.txt: User-agent: * Disallow: / and then whitelist google bot and whatnot. Most of the web is already configured this way. Just check robots.txt of any major website, e.g. https://twitter.com/robots.txt https://twitter.com/robots.txt