Don't hide the fact that you're using WordPress

I actually read the post for the plugin that probably prompted this blog post of yours (I saw your comment at the end of it the other day).

I agree. It's been stated numerous times from the WordPress devs themselves that trying to hide that you are using WordPress is futile. Which it is.

Your post mentions the 2 primary things needed to secure your WordPress installation; 1. strong passwords, 2. up-to-date WP and plugins. I would add: choose a well regarded hosting provider.

To enforce strong passwords when you're working with a larger group you may want to look into this plugin:

  http://wordpress.org/plugins/enforce-strong-password/

Otherwise, well done.