Admins can't remove/edit Lists from Shared Lists.

I think I can imagine why this might be the case, but a customer just asked about this. He would like to be able to remove custom Lists from a module's Shared Lists display, even though he (the main admin user) didn't create them.

I can see his point... What if a load of lists are created by users and then those users leave the comany so they are now inactive or deleted? How can an admin then "clean up" the Lists?