A few years ago, I was walking along the pavement of Shaftesbury Avenue, just up from Piccadilly Circus, when - from the front passenger's window of a large car which had just overtaken me in the slow moving traffic - was tossed a bulging McDonalds take-away bag. Red traffic lights then caused the traffic to stop a few yards further on. Astounded at such a blatant, provocative, act of littering, I picked up the bag containing the remnants of several fast food meals, caught up with the car and knocked on the same window, noting as I did that it was darkened - as were all of the side windows. After a short pause, the window lowered - to reveal four young black men, all dressed in various permutations of 'gangsta' kit, staring at me. Gulp! I stared back for a second, then pushed the bag through the window, saying "You dropped this a few yards back". Silence. They stared at me; I stared back. Then the cars ahead started moving. "Sorry", said the recipient of the bag; up hummed the window, and off went the car.
I like to think I'd do the same again tomorrow if need be.