[Mailman-Developers] is restricted unsubscribe possible?

I think I failed to see how can I make a list set up so that its members cannot unsubscribe without owner's approval? (Or does "approval for subscribe" setting cover unsub messages as well?)

I would like to use a list as our 'problem notification' service but I don't want to see clueless idiots, erm, I mean, windows users :) playing with subscriptions at all. It should be act just like a 'glorified alias file' (but much easier to handle).

bye, grin