To think you can rely on any fence is just not going to work. Fences can slow down a few folks, but anyone can beat any fence, wall, gate if given enough time and or tools. Folks have always gotten past them, and a test by the Army Corp of Engineers conducted at Nuclear Facilities showed the biggest baddest fences delayed attackers less than 20 seconds. In my time spent in Israel and the wall being used between the west bank and Israel, people actually made appointments in Jerusalem, knowing they would have to cross the wall. Cell phone calls are made to setup folks throwing things to people on the other side of the wall. Walls and fences are more like flow control, people tend to avoid them, but can get over under or around them as needed.
from CTI Consulting http://ift.tt/1KCEYN8]