Plant Alligator Juniper (don't know the "real" name, but it's a low-growing juniper that grows like a weed and hurts skin when you brush against it.. I like to think of it "biting" skin) along the edge of the property.
How about this for a "fake camera" system: get some small wooden boxes (Michaels, Walmart, Hobby Lobby), paint 'em black, drill teeny hole, get red "fairy" Christmas lights from eBay (
http://cgi.ebay.com/100-LED-Re...), attach to either light-sensitive timer or a regular timer ($7/walmart) so that it goes on at night, and hang near item is at. People are not going to get too curious as to a black box w/a red light pointing at them.. everyone knows it's a camera. Or, you can get a couple of Icee cup domes, paint them opaque grey, attach them to the large Icee cup painted black, and hang them nearby in trees w/some scrap wires leading out of them and down the tree. Will look just like a camera thingie.
I can understand with the barbed wire thing. And you're not that old!!! *HUG!!!!!!!!!!!!* (but, you can claim "flashbacks" or something and just shoot people like crazy Vietnam vets do.. my father included! Although he's never shot someone that I know of. I know he's shot TOWARDS someone, but not actually shot them)
