This is as much a PSA as a pet peeve.
If you are in a car accident that DOES NOT involve anyone needing emergency medical attention then go ahead and get your ****ing cars out of the middle of the road. I know, I know, you've just had a car accident, and you're very special and the police will probably dispatch their top of the line CSI team to come do a forensic analysis of your fender bender so you don't want to disturb the crime scene.
But actually, that's not going to happen. The very first thing the police officer is going to do when they get there is to tell you to move your ****ing car out of the road. They don't care about whatever story you want to tell. They are not going to investigate the scene. They will provide you with a form that you will use to make a statement and they'll likely give a ticket to one or even possibly all of the drivers involved. The insurance companies will figure out which one is going to pay for the damage.
TL;DR
If you're in a fender bender move you car out of the road.