BuddyPress.org

This is something I found on a Russian blog while surfing:

http://jehy.ru/articles/2009/03/26/buddypress-plugins/

From the plugin page:

1) admin_profile_fields.php – Adds two fields to user profile – “score” and “level”. Site administrator can edit those fields, others can only read.

2) restrict_viewing_by_level.php – based on the user level, restricts viewing of user blogs and profiles higher then your own.

3) post_content_level_filter.php – Adds a tag for hiding content from users of a lower level.

Could be useful as a base to extend upon.

Listing it here for reference only.