Or, those who can move over a lane to let you merge, but don't.
Or, those that decide to speed up when you go to pass them. Did you just wake up, or are you offended that I would want to pass you?
Drove 75% of the way to Florida behind a guy like this one time.
He was cruising in the fast lane doing about 5 over. I like to set the cruise at about 13 over, so I come up on him, not too aggressive, and I even slow down a bit to show him that I want to pass, but won't be a dick about it.
He proceeds to speed up to about 10 over. Still too slow for me, and there's no one ahead of him, so I just want to get by him and re-set the cruise and not worry about it. So I keep inching closer, and he starts to get mad that I'm getting too close.
Eventually I had an opening in the slow lane, so I got over into that lane, got past him, and then got back into the fast lane to set the cruise. 10 mins later, he's passing me on the right doing 15+ over, and continues on like that, off into the distance.
About four miles later, I catch up to him... he's in my lane again, doing 5+ again, while I've had my cruise set at a steady 13+. This process repeated itself for like 5 hours. I was pisssssssed.
Guy didn't want to drive at my speeds, but he also didn't want to be a follower. I don't get it.