Perhaps I'm not making myself clear...I'm not talking about slow overtalking, I'm talking about rolling roadblocks in which neither overtakes as such, they just pull out, rumble along for x miles and then pull in, only sometimes overtaking. This can often takes several minutes. On some roads, particularly those leading to major ports, it amounts to an almost permanent block as there are so many doing this. I can't really see why it should acceptable.
That said, I live with it, I just think it's daft slowing everyone else down quite considerably.