I often use labels to mark files/directories that I prepare to delete, but not immediately (e.g. I want to send them to someone first).
Sometimes after deleting labeled file/directory a new file/directory is created at/copied to the same location with the same name and is already labeled, that is somehow confusing.
To avoid this I need first to reset label each time before I delete labeled object.
I would suggest an option in preferences for resetting a labels along with deleting objects and/or option to reset labels for objects that do no longer exist (preferably/optionally only for paths on local disks).