I'm going to create this page in the membership site in anticipation of the new social features coming whenever you release them.
It would be useful to be able to exclude a contact from the directory, as I have some clients who are actually parents of students. They likely won't want to be in the directory; usually they don't even access the membership site.
I'd also like to exclude my test account, which I use to test new features as a 'client' from a second browser. This would prevent me from confusing people as there are currently two "Nicole Warner"s as users.