I followed a top of the range BMW out of local Tesco's and saw a pile of paper thrown our of the rear window. A short time later, when were on a main road, a plastic Yazoo bottle was ejected. I flashed my lights and used my horn and the BMW stopped. When I said I was pissed off with them littering, the driver gave me the finger and told me to mind my own business (in stronger words).Am I an old git?