Ha, pay attention to people crossing an intersection making a turn. One lane coming towards you turning their left onto a road with two lanes. You will see almost all of them switch lanes even when the dashed lines have been placed in the intersection. In theory you facing them should be able to safely make a right on red but in my area you risk your life and will surely be honked at if not worse. Actually, rereading your post - that is EXACTLY what I'm talking about. You get it! People who swap lanes like that kill capacity and in my area have the nerve to get upset at YOU for daring to pull out. Argh!
Here's a peeve - I have crosswalks with signs all over my commute and I drive through them daily. I see pedestrians stranded at the curb all the time and I stop for them - they usually look shocked! Doing this I've been yelled at, honked at, cursed, passed on the right, and in one case the car behind me was rear-ended. I'm not panic stopping and the speed limits around many of these is just 25mph. It's courtesy! Many of these folks are going to a grocery store or walking to work when I see them. The flip side is that at night they are often wearing black and are near invisible if not under a streetlight. They often tend to skip crossing at the corner where it's lit and there's a crosswalk. I knew a guy growing up who thought he could "make it across" a road and didn't - he spent a good bit of time in the hospital as a result. He tried to cross a 4 lane road, no median, outside of a crosswalk - it was his fault for sure.
Stop signs.At a friend's house out walking their dog I see people literally drive through their 4 way and I see the same at the end of my street albeit with less traffic flow. Some of them barely slow. I was taught to look all ways and there's no way you can do that at 20 or more MPH and if someone else is coming doing the same on the cross you've got a problem. On my street it used to be a 2way until one too many cars ran it and ended up in a neighbor's yard up against their house.
Here's one education could fix - school bus coming towards you stops to let kids out, red lights flashing. It's a road with a median strip in the middle dividing it. In my state you don't stop, morons do usually by slamming on their brakes unexpectedly and then wondering why they're being passed and what all the noise behind them is about. That occurs about once a month, I try to miss school bus time...