Dumb or Stupid?

Stupidity is relative to your own thinking. What I might think is stupid doesn't mean someone else might think is stupid. Confused? Welcome to my world. Is this driver stupid? My brilliant photography shows this person using uncommon sense. Passing in a no passing zone requires one to be dumb. Passing in a no passing zone while traveling uphill? STUPID!!!!!

What was gained by such a daring move? First to the next stop light about 10 miles down the road.