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the gang pad next door usually has a few good places to hide em, no one would think to look there.

do it to a live one.......

Dont forget the GPS tracker too...

how about a pistol sized safe at face height with a weak door and a very hard, spring loaded boxing glove (or brick) inside. and a trail cam for showing off at the pub later.

and if they are really keen, they will come when you are sleeping and rudely wake you, before politely asking for the safe to be opened.

Um, emery boards then! they will be horrified when their nails come out ground down to the bone!

and a few razor blades for untrained fingers....

decoy safe with grenade rigged inside.