I can't believe the security guard didn't think it was his "job" to put the call out over the PA system! What an idiot.
And that dog owner....well, there's a special place in hell reserved for the likes of her.

Here where I live, you can be fined for leaving your dog in a car.
You are right....some people don't deserve to have dogs.
PS - I am fascinated by your Bergamascos, I've never seen one before. Are they related to the Puli in any way? Must be something when they come in after a walk in the rain!