Nothing predates upon stink bugs to my knowledge. They really are gross when crushed, you won’t soon forget the smell. Very protective, that. The things are weird, so ponderous, stupid and slow, like some sort of insect dinosaur. I guess protection from predators allows them that luxury.
I've sprayed them with various insecticides, including "Wasp & Hornet Killer", and the damn things just brush it off and fly away.
They're not of this Earth ...