Or, so it has been said! Now the query here is what anyone of you have, or plan to have, for an "external" or "primary" perimeter defense......? I have researched this and looked, and questioned, and I have discovered a fallacy of sorts, about "perimeter defense" and fences. Fences, are like locks, ONLY there to keep the Honest people, Honest! They may keep unwanted 'guests' out, such as coyotes, and other critters. They may keep your chickens, and sheep, and cattle, and even small children in. They won't keep people out. Certainly NOT the hungry, and determined people. The U.S. Army came up with a unique design, called the "Double apron barbed wire fence". We were trained to get past it. They even gassed us while we were doing so! We made it....So can "others"! Now, you can put up 6 strands of barbed wire and it has to be quite tall and quite heavily tensioned, but, the tension always makes it easier to climb up and over! Like chain link! Kids climb that easier than a goat on a rolling hill! At 220 lbs, and 59 years of age, I go over or thru a barbed wire fence so fast, it scared my old ( 49 years), caretaker silly! ( today he is re-thinking his barbed wire fence after all the cost and labor, it was NOT even enough to slow down an old "crippled fart" like me!) It really GOT his attention! And no, I did not even get a single scratch! You can use doubled fencing, and it will serve ONLY to slow the "other's" or whatever you may chose to refer to them as...down a little bit. It will not stop them. I have seen people climb those really high fences placed around those commercial batting cages! So, Whats the answer? I'm not really so sure.....short of a "no mans' land" with a cleared "killing zone". Got towers? I know you can dig trenches/ditches, and use huge/heavy rocks around areas to stop vehicles. Tall fences can even stop the so called "biker gangs" from doing what Steve McQueen did in "The Great Escape"! But, what about those on foot? Electrically charged fences only work the FIRST time. They can be neutralized! Wires can be cut, shot, whatever, and even shorted out! The fence is now a moot point! Besides, Most electrical fencing use small diameter, smooth wires anyway. So, back to square one. What can be done to STOP anyone from entering an area you do NOT want them to come through? Cactus plants are something you could use, but they can be knocked down ( wood: planks/boards) and even set fire to, and then they are no longer effective at all. The best deterrent I have yet to find, is man's 4 legged friend. DOGS! They can see, hear, and smell things we don't want to even know about! They can be a severe deterrent to a few, but they cannot be expected to take on say 4-6 individuals, if they are coming for you, your's, and any food. Now IF you happen to have say 10-12 Rottweilers, Dobermans, or even German shepards ,and they are sufficiently trained, you have a chance. The dogs, well they have NO chance against small arms fire. They won't even get a single bite in, and they'd be shot! Now, IF there were 2 fences, one located say 8, 10, or even 12 foot inside the primary or external fence, and the dogs were held back until the "bad guys" or "invaders", or "zombies" or whatever, came in to that area....then they would be far more effective that way. But seriously, I can see the holes in even that type of defense. Logistically speaking, it's a nightmare. It would take a myriad of systems, fences, and dogs, to have any effect that could be called "effective". Lights, cameras, electrical fences, barbed wire, alarms, and dogs....not cheap, and not effective, without someone there at all times to watch and keep an eye out. Any system can be "breached". It may take time, it may take ingenuity, but it can, and more than likely will be done. Never underestimate the opposition! Never! A friend of mine asked why we can't use "boobytraps". They are "illegal in all cases". ( well it really all does depend on the circumstances, scenarios, and availability to law enforcement, now doesn't it?) The real Trouble with booby traps is they cannot and do not differentiate between colors of uniforms, flags, or the good guys and the bad guys! They are designed to harass, maim and to kill. They do what they do, very well, without bias, prejudice and conscience. They are extremely dangerous and IF you don't know where you put them all, and what you did, you are in serious trouble! I know. I almost got my head taken off by one of my own, just "playing around" in the back yard. I don't do that anymore! I learned and I was damned lucky too! Like wiring a shotgun to a door knob.....You may know it's there, but how well does a family member remember? Yeah, it's a place I suggest you don't go. With all of that having been said.....I came up with a couple ideas, but unable to implement them. Ever work with coils of "razor wire"? They do work, BUT they have to be stacked up so that they are at least 6 feet in height, and a roll, the last time I called, was $212.00 for a 100 ft roll! It takes 2 rolls for the bottom layer and one on top, to work! 3 per "section" ($636.00 per 100 ft!) I cannot even buy the wire unless I own a commercial piece of property, and I have to prove it! It would take me some 9 rolls for the north and south ends of my land, 300 ft each, ( 18 rolls so far) and another 18 rolls for the west and east sides, 600 ft each, ( another 36 rolls!) That's 54 rolls at $212.00 each! I also need the "clips" and special gloves to handle that stuff! So, that's out! Next? I can't dig a moat and have alligators or pirahna! ( dang it!) It's a perplexing dilemna, IF you take it on! I am still searching for the answers.....I can put in lights that are on auto sensors ( good at night, worthless in the daytime)...I can put in alarm systems of various types, IR, motion detectors, and such. I can put up doubled fences, and even have electrically charged "cattle" fences. I can get 4-6 dogs and work for the next year to year and a half training them all..... Sheesh! It's a nightmare! You can always revert to a manually controlled defensive system. More than likely it is again, ILLEGAL. Personally, I am looking into some really bright white and red ground flares ( not illegal!) as well as some bright orange ground smoke units! (also NOT illegal). I am looking into pyrotechnic whistles as well! They work at night or daytime and scare the beejeezus out of the guy that trips it! You have multiple ways of placing certain things that will "alarm" you of an intruder. You can't "LEGALLY" use deadly force to stop them. There are some "12 gauge blank firing units" out there, but they are NOT chaep by any means, nor are the blanks. They can be a real deterrent, but they may also cause the person that trips it, to OPEN FIRE on anyone they see! If NOT used correctly, they can be seriously nasty ( enough said). Today, you can be sued to the end of time if a person breaks into your home, slips on the throw rug or waxed floors! It's pure insanity! I don't have the answers, but I am searching for any!