It seems so hard to keep a unit from dropping items when they die and yet, to get a unit to drop an item while they are alive seems even more impossible.
You can't move a unit instantly while it's in inventory. You can't kill a unit and have it persist, if you kill a unit that has persistence it will not die in inventory until it's countdown ends at which point you cannot revive it. You cannot issue an order or apply an effect that issues an order that both affects the holder and targets the item and then targets a point.
If you disable the inventory ability, it will only keep the unit from being able to manipulate items in it's inventory.
Steal item ability looks like it's not gonna happen. :(