Forums / Cotonti / Core Labs / Archive / Hidden Groups Issue

This has nothing to do with 0.6.8, Siena, filters or using random names. And I have no problem viewing anything as admin. What I am trying to say is: 'Hide group' makes no sense for me at all.
1. It doesn't work as expected
2. Hiding membership makes no sense at all
3. Nobody uses this because it's hard to understand the purpose
If someone does use this feature, I'd like to know what the benefit is and why it should not be modified.
Why would I need to hide a group? Ok, I got a site with a forum and an eshop, and the requirement is to autoregister a buyer upon successful purchase putting it to the Buyers group. And this is the group I'd like to hide. Other potential use is hiding clients or vip groups and protecting their user details.