My DS2 screams and shouts most of the day - often when held down (e.g. by the buggy straps or car seat or in his highchair) but sometimes just as he is walking around the house/garden/street.
It isn't a naughty scream but more of a communicative shout and scream. We talk to him loads and include him in conversations around the dinner table etc. I tell him no and quiet but it doesn't make any difference - he just smiles and carries on. I am conscious of him not getting attention when he screams or shouts but this doesn't make much difference. This has gone on since he was about 6 months old and is getting louder. There is no problem with his hearing.
We can no longer take him to cafes or restaurants, the supermarket has become too embarrassing and car journeys are a nightmare. Any advice? Can anyone tell me this will pass? It drives me to the edge every day.