The mothering instinct to boldly go cross country

When hardly a week goes by without someone in London being given air time to bang on about four wheel drive cars and how deadly they are to children how come the main perpetrators of this environmental and safety atrocity are mothers on the school run - and what is it with these designer cross country wheeled push chairs? Mothers use them as child friendly battering rams and I wonder that they don't just fit scythes on the wheels, paint their faces blue and get it over with. London buses are now considering refusing them passage so perhaps 4x4 drivers can give them a lift to the nearest wilderness.