I'm one of those people who not tailgate as close as that guy, but make my presence known in traffic. I'm all for leaving a few car lengths between you and the car in front of you. It's a smart thing to do.
It's the people who leave 7-20 car lenghts that piss me off

I don't understand how it's so hard for these people to coast within a 1-2 car length spread. THEY are part of the problem of slow congestion. Don't even get me started on the merging of the on-ramp.