I found it interesting when a little girl (most likely autistic) in my daughter's class went around and told everyone to cover their ears because she needed to scream. Obviously someone had taught her to do this, and I like the message she must have been given: it is OK to scream, but you must consider those around you. I think that is the type of message I would start trying to impart: scream if you must, but show some consideration for time, place, and those around you.
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).