Probably easier to make the re-routing seem legitimate/boring so the handlers don't think something is amiss. More subtle than a G-Man telling you "when package

Probably easier to make the re-routing seem legitimate/boring so the handlers don't think something is amiss. More subtle than a G-Man telling you "when package #ABC-123 is scanned put it in the other pile, and tell no one", or workers noticing their co-worker is putting packages in the wrong pile.