I could see a use a screen saying, I'm travelling as fast as the guy after me, so back off. It's so annoying to be after those drivers that can't seem to understand it's not your fault that you're driving so slow.
That's only OK if you do actually plan to overtake the guy in front of you. If not you should leave enough room for the guy behind you to overtake you. It's really annoying when people sit with no space but don't overtake.