There is a simple thing that I have used to keep unwanted persons out of my
'secure areas'.  I located a local military surplus store and found a little
device called a trip siren, there is a small pressurized canister attached
to a trip wire.  The trip wire is stretched around the hive area and when
the unsuspecting vandal approaches the area and trips the line the
pressurized canister emits a loud whistleing sound heard over a mile......
 
Another thing I have used because I am a law enforcement officer is
available at most hunting outfit stores is a infrared sensor camera, it can
be attached to a nearby structure and when the infrared beam is tripped it
takes a picture of your suspect...all you do is take your camera to the
local shop and have the standard 35mm film developed....and you have a nice
picture of your suspect..
 
Depending on your local laws I have more ideas.....
 
Chris Guppenberger
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"When I talk about my honey....its my bees not my wife...."