Yeah, the same trick works on Priestess Gut to prevent her from crying out to her guards if you murder her in her room. Cast silence and then go to town on her.
There is an amazing interplay of systems that mostly work as intended.
GOOD idea!! I didn't think of this!!
You want another good one?

The tub of booze in the Goblin camp - most people know you can walk up and poison it if you are stealthy and can pass some checks. However, you can also just throw poison into the tub from far away and avoid the checks. Usually kills a bunch of Goblins and weakens the rest. For goblins, broken glass in beer is their equivalent of a Michelada or a Chelada.