Smartphone zombies are such a hazard to themselves and others that in Warsaw, Poland the city is installing "sidewalk traffic lights," which project large red or green swatches of light onto the pavement at street crossings. The smartphone zombies have their heads down and don't look up before crossing the street.
We may not have reached maximum stupidity, but we seem to be getting closer, as it appears we have people more interested in their smartphone than actually staying alive.