bloke i know is into all this sort of stuff like shotgun cartridges on his shed door thatgo off if you try it on and trip wire and the obligatory cctv.
he is a gun dealer too and has the old bill come round regularly for inspections and stuff. they arn't too happy with his collection of japanese swords either.

the best one he told me about was the neat square hole in the ground with broken bottles,sauce jars,and very sharp glass in that he knows where it is but thevin twat doesn't,he has heard someone go down it at night screaming and bleeding with claret all over the place.

he lives on a estate where people have very nice front gardens and stuff and noticed some cunt was robbin his flowers so set a trap,few weeks go by and he hears some fucker screaming again and they have cut themselves on his flower and bush security device