Well I'm experimenting to disable the selection functionality and do selection through triggers. It works on units but not on items.
Here's a scenario:
An item drops. This certain item says "[Weapon] Sword". Also this certain Item, when selected normally, has an item description saying, "A sturdy iron sword".
Now because this map has selection disabled, I give my unit/hero an ability where it targets an object. Cast I trigger a "Unit - Select Unit for Player" or "Item - Select Item for Player" (if there was one).
I do think I can just really live without that item function. I'm just hoping if there was a way to do it, I'd go and do it.