What is consider best practice today for blocking pages, for instance xyz.com/admin pages, from getting indexed by the search engines or easily found. Do you recommend to still disallow it in the robots.txt file or is the robots.txt not the best place to notate your /admin location because of hackers and such? Is it better to hide the /admin with an obscure name, use the noidex tag on the page and don't list in the robots.txt file?
