Force toolbar for logged in users?

Okay, I know how to force the toolbar on everyone, and I know how to make the toolbar appear by default, and I know how to hide it…

My question is: How can I force logged in users to keep their toolbar visible? I don’t want people going into their profiles, unchecking toolbar, and getting freaked because they can’t log back in.

I also don’t want the toolbar to appear when a user is logged out.

So… what do I do??