I'm sure a lot of these folks are too busy using a cell phone to bother with something so trivial as paying attention to the road while driving.
...or too busy watching the road in front of them to worry about something as trivial as someone behind them who thinks they have any more right to the road than anyone else. (and I'm travelling at or slightly above speed limit).
Someone mentioned "entitlement"...it goes both ways...why do some people think everyone on the road should yield to them just because they are going faster?