A clean sweep

I’d subconsciously thought that graffiti is mainly the work of disaffected, disadvantaged youth, and is difficult to remove. Seems I was wrong, on both counts. If the first places the police target in a crackdown on the taggers are in the more affluent estates of North Swindon, and a man in his seventies can keep twenty bus shelters clean of graffiti, then all, in the fight against the taggers, is not as it seems.