Imagine, if you will, a road that leads solely to a set of on-ramps to a highway. One goes north, one goes south. Now imagine a car following closely behind another car in one lane. If you were that car and wanted to pass the car in front of you, would you (A) slowly pull into the other lane and slowly pass the other car, then, right before the lanes diverge, pull back slowly into the original lane, without having actually finished passing the other car and without signaling, thereby forcing him into the shoulder or (B) pull into other lane, actually put your foot down on the accelerator to get to a speed where you could actually get in front of the other car, then signal and pull back into the lane.
I, and I hope most sensible people, would choose B. Apparently, the person I saw earlier disagrees with that assessment. WTF, indeed.