I’ll provide an unpopular opinion. People who rigidly stick to the “furthest left lane at all possible moments” are far more dangerous than middle lane hoggers. I witness many, usually white vans, who seem to want to enforce this rule seemingly moving constantly like a pawn on a chessboard. I think some people (not suggesting you) don’t seem to recognise that in congestion, 3 lanes actually provide more capacity than 1, and that it’s not possible or logical to stick to the left lane at all times/conditions. I will yield that the far right lane is sacred and you really do need to be demonstrating some significant overtaking to be sticking in that lane.