Personally I shield myself with a small cluster of bats. This also has the added benefit that nobody can make any building alterations around me without a bat survey.
Actually I think there’s something here for me and my bats.
BOBB
Buffer Overflow By Bat
So you need to identify a vulnerability in the ultrasound message parsing code in the application, develop an exploit for it, and then train your bats to go out and deliver the payload to unsuspecting day walkers.
All I need now is a suitable logo!
Oh, and bats. Definitely need bats.