I don't know if this was suggested before, but i can't search for it because i don't really now what to type in the search bar.
Maybe it is better if the person who used Theft/Vandalism can't open 2 accounts to alt vault, or the alt can't pick up the items his main dropped or something until the scents vanish.
Because it's very anoying when you finally kill the thief or hired a ranger for it, but then you see the items were alt vaulted.
Well, this was my idea.