The worst is attitude that if you're driving in the left lane you MUST exceed the speed limit by 15-30 MPH or you're in the wrong. I use the left lane for passing slower cars, not for speeding. I do exceed the speed of the slower car by 5-10 MPH to avoid their "speed matching" me (which can be either a normal reaction or their just being a butt hole). I do return right ASAP. But just because you want to criminally exceed the speed limit doesn't mean I must as well.

Also up there in rude behavior (or outright stupidity) is failure to keep an adequate distance from the car ahead. The NJ Drivers Manual tells you to stay THREE SECONDS behind the car ahead. If you do that you vastly reduce the chances and the consequences of a rear-end collision and you make zipper merging feasible.

Classic BS: I'm in the right land and ahead is a row of cars entering on an on-ramp, maybe 1 or 2 car lengths between them. There's no way I can engage in a zipper merge with them. I can either continue and cut them off or I can move left. THEN when I move left, they all speed up ABOVE the speed limit, effectively trapping me in the left lane. To be safe I would need to merge right between two cars who have left a six-second distance between the -- but that will never happen in NJ.