Prats with Lasers
This is quite a common problem, particularly for airliners.
Knowing the average Crawley resident ( and my apologies if you're one of the good ones ) I'd expect Gatwick to suffer this...
I've read here of people being successfully tracked down & prosecuted - though whether severely enough is another matter - hard to think of a way of deterring the gits without resorting to nasty pointy things which might upset the local housing values !
A police helo with Nightsun, or better still an A-10 firing rubber bullets ( ?! ) , spring to mind...Is it possible to dispose of airliner loo contents with accuracy - a mod' scheme is needed !