Look at the bottom of the home page and you will see statistics. In the statistics, there is a list of who is online (refreshed every 10 minutes). Instead of the names being all the same color, we can designate different colors for different titles.

For example, I placed all of the Headmasters as bold and maroon. When someone is online, you will then know if they are a Muggle, Squib, Hogwars Student, or Upperclassmen. Each of those designations has different posting abilities, and sees different features (e.g., a muggle cannot see the chatbox; some cannot see fan fiction, some cannot start threads but only reply, some can only get into the introductions forums).

Make sense?

Now, what colors (and fonts) would help clarify the user titles?