Although I completely understand why gamekeepers feel the need to do this, (as an ex gamekeeper) but in this day and age of mobile phone cameras, trail cameras, pinhead cameras, microwave cameras, infrared cameras etc etc etc, I am amazed some still resort to this method, that is 100% guaranteed to catch the person setting the trap, if it is discovered.
Livelyhood gone,
Family home gone,
Potentially marriage gone, etc