re: People on interstate in left lane going speed limit, doesn’t care or doesn’t know?

I drive in the left lane at times when exceeding the speed limit passing slower traffic on the right. However, I monitor the road behind me and move over when someone closes in. I set the cruise control so I am not modulating speed which pisses people off. You would be surprised at the amount of people who don't use cruise control unless they go on long trips. They drive 75 MPH in the left lane, get a phone call or get distracted, and the next thing you know they are going 65 MPH without realizing and are not monitoring the traffic behind them.