I come across these types all the time. Long line of vehicles behind them, followed by a long line of vehicles passing them. They see it.  I've even seem them look in the rear view mirror and nothing. They know what is happening. They just choose to not move over because, well, they don't give a hoot. There are all sorts of curse words to describe these people that would get this comment automatically blocked. 

No different from the people that drive in the middle lane when there is absolutely no traffic to the right of them - which is common down here on the 401 between Windsor and Tilbury.