I'm completely on your side on this but be very, very careful what you do. If the poor dears get hurt, it could be you that ends up being persecuted, oops sorry that should be prosecuted.
I don't have any great disagreement with natural justice except insofar as to point out that e.g. if there's a petrol leak and the fire crew have to break in to deal with it, they don't deserve to be electrocuted and possibly immolated as their reward. On that basis, if no other, I'd agree in principle with prosecuting people who set booby traps.