Thanks for the answer, but I didn't mean copying or any other filesystem operations. I mean when a folder's subfolder is opened in MC, it prevents from deleting that parent folder. Windows Explorer allows you to do that: if an opened folder or it's subfolder was deleted, Explorer will just 'cd' to first existing parent folder in the path, no access error occurs.
UPD:
Yeah, that's probably also kind of "files in use", but probably there is a simple workaround?