Ellen Hammett: Beware the ‘subvertisers’ if your deeds don’t match your message

You might think they creep around in the dead of night, dressed head-to-toe in black, but most of them operate in broad daylight, disguised in high-vis jackets that make them look official.
The really committed ones have even ironed on an outdoor company’s logo that they’ve downloaded from an online manual, which is also where they learn how to ‘hack’ bus stops and other outdoor sites.
They are ‘subvertisers’, ‘brandalists’ – an ‘