Unless they're driving an ambulance, I can't understand how that "5 seconds" really benefits them in the long run.
Just jerks, I reckon.
For several years I drove "drag" on a group of 100+ bikes on the way back from the state ABATE party.
If the group had to stop along the road, it was my job to make sure they had clear highway behind them when they started out again.
I also had to stay on their backs when group lane shifts were necessary.
I took "my duty" dead seriously and many times risked my own life to ensure the safety of the group because of cars who would dart around me with only feet to spare and then weave in and out amongst the group.
If I didn't keep right behind them at ALL times, literally scores of cars would pull incredibly stupid and dangerous stunts over the span of the 80 or so miles home.
I have never figured out what was *so* important that you *had* to gain that extra car length or two.
And I stop for ambulances. I think they probably don't notice, people aren't always thinking with their entire brain while driving, which is the cause of most accidents.
On the freeways I understand what's going on, I do it my self on occasion (especially when I had to drive on the freeway to get to work). Sometimes driving on the freeway people get into a "passing mode", where every vehicle in front of you exists just to be passed, get to doing some pretty crazy stuff when the passing mode hits.