We drive behind them at the speed of a walk.
Note that I don't live in your neighborhood, because, well, I fear that my temper would get the best of me and I'd run a few over.
I did encounter a fellow on roller blades in the middle of the street the other day who refused to move to the side walk. I followed along for a hundred yards or so, wondering if I'd encountered a mentally challenged person of some stripe. He moved to the sidewalk at the next corner and I didn't bother to ask.
You know, one possible solution to the idiots walking in the street might involve a paintball gun cranked up to 300 or so. I know from experience the paintballs will leave welts at close range.