It seems like most drivers don't know how to use their turn signals correctly. Either they never use them and suddenly switch lanes/turn, or they drive for a couple miles without knowing their blinker is on, and your not sure if they want to get in your lane or what. Amirite?
Or they turn on their blinker as they're changing lanes.
Some people act like they own the road. Oh, you put your blinker on? Let me just slam on my brakes and get out of you way your highness.
I hate when people try to change into my lane, into where my fuggin car is. People drive like derps. How can you possibly forget to look into the lane your changing into to see if there's a car there or not? When they do that, I honk my horn, and speed up so they can't get into my lane. And if they slow down to get behind me, I slow down too. I'm an asshole.