Also, when your blog is visible for everyone, hides the option to avoid accidental changes...
Download the plugin from WordPress plugin repository.
Upload all files contained in visibility-warning zip file to the wp-content plugins visibility-warning directory of your wordpress install ..
Activate the plugin through 'Plugins WordPress...
There are two ways, if you deactivate your plugin the menu link will appear.
Or in URL textbox of your browser, modify at the end of URL and type wp-admin options-privacy php ..
For recent WordPress versions deactivate this plugin if you want to access to the option of discourage search engines from indexing this site Reading Settings..
Browse the code, check out SVN repository, or subscribe to the development log by RSS...
Updating code for the latest WordPress version.
Fixed initialization, now works in admin area. 1.0.
Read more