I must admit that on the A32 that I have "played with" on a
occasion.
I only use a short stretch and in windy / wet weather there is a dip by the Hoeford pub where the on road facility is unusable, so I move into the traffic.
Typical was one guy who then moved in to block the cycle path, and then when I moved out did the opposite.
A couple of times now I have deliberately pulled in behind them and simply waited until they move in, then move out, then when they move out, I move in.
The record is 24 moves in the few hundred yards