Doing a bad review of the drone company will directly affect the old bat since she led them to believe it was legit. Secondly if your rich and snotty nude bathing neighbours were to sue both the drone company AND Mrs S. that would also have a strong effect on her. You should put that pearl in their ear.

See, here's the thing. the drone company should have done their due dilligence and gotten actual documented proof that the deal was okayed. So right there they can get sued.

Plus nasty google reviews from assorted angry neighbours detailing what they did will really set the fox amongst the chickens. Google reviews are highly prized.