No, howver I have in the past. There was not a number on the side of the ambulance to call and I guess I could have looked them up online.
I really don't have a problem with the slacker sleeping in his ambulance. My issue is with the fact that is idling for the duration of his nap. At that hour it is cool enough to put the windows down and enjoy the breeze in the shade of the overpass.

They have left and only stay in that place for a few air-polluting hours.