U-M Directory group owners will now be able to make their members private:

“Privacy Feature for Directory Groups
You will be able to make U-M Online Directory group entries private, hiding the group’s membership list from public view. If the group owner chooses to make the group private (by modifying the group entry and clicking the True radio button under the new Private Group heading) only the group’s owners and members will be able to view the membership list.

Note that this does NOT prevent non-members from sending e-mail to the group. ITCS is working on that feature and will implement it at a later date.”

And to be fair, I’m not the first U-M blogger to post about the change!