Guardian: Tomorrow is Buy Nothing day in the United States. A group of people including myself will preach and sing at the front door of Macy’s department store in New York. We do this every year. We’ll be there at 5am, when shoppers who have been up all night wait in line rush the glass doors. This is the human comedy at its most sad, and it is an environmental “shopocalypse”. Buy Nothing day is an old idea – that we should drop out of consumerism for 24 hours on Black Friday, the day when we …