An incisive and moving article by Alex Andreou, who has experienced defensive architecture first-hand.
There is a wider problem, too. These measures do not and cannot distinguish the “vagrant” posterior from others considered more deserving. When we make it impossible for the dispossessed to rest their weary bodies at a bus shelter, we also make it impossible for the elderly, for the infirm, for the pregnant woman who has had a dizzy spell. By making the city less accepting of the human frame, we make it less welcoming to all humans. By making our environment more hostile, we become more hostile within it. Defensive architecture is revealing on a number of levels, because it is not the product of accident or thoughtlessness, but a thought process. It is a sort of unkindness that is considered, designed, approved, funded and made real with the explicit motive to exclude and harass.