A example can be found here: http://ipbtracker.com - try looking at the member usernames. They aren't clickable! Not at forum list, thread list, thread view, or even "The Moderating Team" page.
I also want to extend this to any member that has been banned - no one should be able to access his profile card or the profile directly by disabling username hyperlinks for that user.
Here are some mockups:
If you are interested, please send me a message.