Locking Node Titles After Creation?

I was just curious if Auto Nodetitle could do this:

1. User creates node (title and body)
2. Auto nodetitle 'hides' title from user during further editing
3. Admin can change titles at will

My main reason for doing this is to create a 'wiki' like site that requires users to create nodes but 'lock' titles after the creation of a node. Admins, of course, should be able to change anything at will.

I realize this isn't the major purpose of this module, but it does seem to implement some of these features.

Thanks!