People who can't cross the street like normal f*cking human beings.
I have to drive through a part of "the hood" on my way to and from work, and for some reason even the simple task of crossing the street can't be done properly in this part of town. I was always under the impression that crossing from one side of the street to the other was a cut and dry exercise; (there's even a joke about a f*cking chicken doing it without incident) you wait for traffic to clear, then you go across, 90 degrees straight ahead, from the sidewalk to the other side. Not only does this get you safely to the other side, but it minimizes the time you're on the street.
But lo and behold, the ghetto has this concept f*cked up beyond all reason.
Why the hell are people not only crossing the street as cars go by, but taking an ETERNITY to do it??? One guy crossed the street caddy corner for length of half a block. Why? He could've walked down the sidewalk to where he needed to cross and done it there, but he didn't. Now traffic has to avoid him as it passes which means damn near straddling the center line and squeezing oncoming traffic. In the event someone inadvertently hits that a$$hole, they're on the hook for it.
Another guy was just walking in the street. Perfectly good sidewalk ready for use, and the stupid f*cker decides to walk up the street a foot out from the curb.