It would be something to lob a cherry bomb or M-80 off the roof and watch looters scatter like cockroaches. But you’d have to be quick and hide, lest authorities descend on you en masse. However, that would also be a protective action.
I’ve actually thought about the fireworks angle. It makes sense. Throw a 2,000-count firecracker brick into the midst of these idiots, and watch ‘em run.