[familyop]

Consider depths and materials. ;-)

http://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Metal_Detector.jpg/300px-Metal_Detector.jpg

[B4Ranch]

Be sure to bury all kinds of metals in your back yard. Give them lots of reason to start digging. Bury your weapons in the neighbors yard or on state property, in a park.