Engines running idiocy

I keep seeing - as I did today in the Park parking lot - mothers (I have not witnessed any fathers doing this, but I am sure they do the same thing) turning on or leaving on the engines in their monster trucks (aka SUVs), leaving a child or children inside and then getting out of the car. To say they are stupid is to give them much more credit than they merit. The next time I see someone doing that I am going to call the police and demand that they be arrested on a charge of reckless endangerment of a minor. I am serious about doing this. Test me if you wish.