Off topic reply here, but I wanted to address this because it's a HUGE pet peeve of mine. When I'm in traffic and finally get to the point where I'm driving by the cause of the jam, a wreck on the side of the road or whatever, I always ignore it (I've seen them before) and stay as close to the car in front of me as I safely can. When it picks up speed so do I. Once I'm clear I look back at the car behind me in which the driver has nearly always been rubber necking and they'll be way behind me. I'm hoping that when they look up and see how much space is in front of them they realize that people doing what they just did are the reason traffic gets heavy, and maybe they won't look next time.
If my teenage son is in the car I tell him to get a good look at the wreck, traffic stop, or whatever it is, while he's not driving. He knows to get it out of his system now and avoid rubber necking as a driver later.