This would, of course, cause it to return all item entities of that type in the specified zone. Not sure what the use case for supporting this with ZE: Not Type would be, but I don't see any reason not to add it.
In a similar vein, I think a Scout's Exaltation that works like normal Scout's Distillation but also takes an entity type and only hits entities that match would be super useful.

implemented for the next release!