If its citizens have their way, an entire town could be destroyed in a new reality-television series, “Demolition,” coming this fall on Britain’s Channel 4. “The series is asking for suggestions of eyesores to be put to death, provoking outrage from many architects. … Of course, it is a bit trite to apply makeover-television ethics to the landscape. But perhaps this series will highlight the inadequacies of a British planning system that so excludes the public.”