As a parent of a child with ASD, I can say that just because they are screaming does not mean that they are being abused. For the most part, when a child screams, it is because they are frustrated because they are not getting what they want, and this is the quickest way to communicate that. Especially if they are not verbal, or if they get overwhelmed in trying to communicate when they are upset. I believe most children go through a "screaming" stage before they learn how to talk. When my son was about 2, he would just scream out in a store for absolutely no reason that I could see. Maybe his senses were being overloaded, and I just didn't know it. I did start trying to do all of my shopping or errands when he was at school or with his dad. But sometimes, there are the errands that you just absolutely have to do, and you have no choice. Trust me, I was totally embarrassed when my son would scream, and I would just try to exit the store as quickly as possible.Usually, nothing I could do would make him be quiet. I really never understood how people can just go leisurely shopping when this is going on! Now that my son is 5, it is getting better, he doesn't scream in stores, but he will scream if he is around other children at a playground or a children's play area, and another child upsets him. That is really scary, because sometimes he starts hitting at me and waving his arms wildly too.
I agree too, that there are some parents though that seem to not really be that concerned about it. I think that maybe they have several children, and they are just desensitized to it! LOL!