YOUR SECURITY IS IN THE POST
Some fences protect you more thoroughly than others. Just how secure a fence you have depends on its construction and, in particular, the fence post you use. With a wooden fence post the fence panels are slipped vertically into two U-brackets. These are fixed with a screw, which can be easily removed on the outside and then easily banged through by anybody with devious intent and club hammer.
With concrete fence posts, the whole fencing panels are simply slipped into a groove in the post and not necessarily anchored. In effect they can simply be lifted up and out by nefarious characters who may wish to gain access to your property. They can also be slipped back in again to hide the ingress whilst the villains are inside – if you were on holiday, intruders could have the run of the place.