CiviCRM Community Forums (archive)

This feature of a group does not seem to be documented in the CiviCRM User and Administrator Guide published last month, and I cannot find any information on it in these forums.  The on-screen text by the checkbox "Reserved Group?" simply says "If reserved, only users with 'administer reserved groups' permission can disable, delete, or change settings for this group. The reserved flag does NOT affect users ability to add or remove contacts from a group."  so I am mystified as to the purpose of reserved groups, ie what value they add, or problem they solve. 
Can anybody please enlighten me?   

Thanks
Mark 

Thanks Jon

It is just such a huge shame that there is not an obvious way to restrict ACL groups to be editable by administrators only.
I understand that a reserved group is useful if it has external dependencies (eg via the API) so that unauthorized users cannot change the name or delete it, but it would be so much more useful if additionally its members could not be changed by unauthorized users also (as a CiviCRM ACL restricting access to a group of contacts may be dependent upon it).  Is there a way to achieve this somehow, eg using CiviCRM ACLs?  This would be so useful.

Thanks
Mark