Let me say right off the bat: I think Facebook is a great tool for passively receiving information and potentially for advertising your goods and services.
I do not think it is the best platform for in-depth discussion among several people. When I consider the characteristics of a good platform, I think of:
I can't take credit for most of this, but modified it slightly to include both network and public IP addresses.
See https://gist.github.com/johnantoni/8199088 and citations therein for the original concept.
Every so often I want to test a new theme on a live Drupal installation, but don't want to break the website for anyone else. You can use ThemeKey to do this, although it is probably the simplest thing you can do with this module.
Navigate to http://example.com/admin/config/user-interface/themekey.
Create a new rule:
your user name
theme you want to see