passing lane

I've had my work situation change and I've had to commute a lot longer, and drive. I do not like it. Granted the DC metro (subway) system is a complete mess and can be really a PITA, but at least I'm not putting boring miles on my car. Don't get me wrong, I do enjoy driving. I just don't like commuting to work via my car. The worse part is when traffic isn't all that bad, but people are just camping in the faster lanes. Why do people insist on doing this? It isn't even old people who I would say may be going a little senile (or are they?), or may feel comfort near the edge.  There are also clear paths to the slower lane, MOVE OVER!