A few weeks ago I parked my Ford Explorer in a parking garage. It looks like a pipe for carrying a fluid (water maybe?) “protected” by a metal frame. The purpose of the cage is to prevent drivers from inadvertently ramming the pipe with their front or rear car bumpers. But think of all the “attacks” for which it is completely unsuited. The cage is probably doing just what it needs to do, given the resources available for “defense” and detection and response “controls” available.”]
Source: https://taosecurity.blogspot.com/2009/08/attack-models-in-physical-world.html