There is a huge difference between a fine artist making a political statement, and a fashion type 'art' approach to making a visual statement. An artist usually engages with his subject matter for months or years, and usually does extensive research that can encompass contemporary theoretical and cultural debates. It seems that most fashion type projects are just done because they look good and use outmoded shock type tactics to draw attention. Anyway, it seems that a lot of people do not even know what political really means in relation to fashion. And finally, most people in the UK do not travel by tube, so the rucksack is not really a potent symbol of anything for a large majority of the UK public.