I'm truly humbled by that, Pagwatch.
I didn't post back yesterday because what I've learned is that it's one thing to type a post without really thinking about it on AIBU, but I'm not going to do that here on this thread because it matters.
I wanted to post about something that happened this morning. The telling-of-the-tale pinpoints for me something that I was thinking about yesterday but couldn't articulate. Anyway, I've mentioned that I have contact with children with SN and I was at a supermarket this morning with a friend and her 8-year old son (I'll call him Ben) and her 3 month baby daughter. Ben has learning disabilities. I'm not too sure of the extent but he sometimes has a tendency to be very earnest and loud and struggles to focus when he's feeling stressed or out of his comfort zone. Sometimes he's happy to be out and about, other times not so much. He doesn't like people getting to close to him or looking at him.
I'm ashamed to say that what I've always done with Ben (who I truly love) is take his disabilities, translate them into a 'do's and don'ts' checklist and basically leave his mum to 'steer' me. In the supermarket, Ben wanted to get involved in picking things off the shelves and was singing to himself and trying to get away from his mum's hands. She was busy with the baby, I was pushing the trolley and thought he might like to push it for a bit; he did. Then he was bored and a bit overwhelmed and started to cry and shake and laid on the floor. I noticed immediately that people created a wide berth from us, they really felt uncomfortable and I made a point of looking at them to see what their glances 'said'. It was a mixture of embarrassment, shock(?), and irritation - manifested in outwardly ignoring him. If I hadn't been on this thread, I would never have bothered to look at the people around us... but it's true, from just a few seconds, people go from outward acceptance to 'backing away'.
Ben was still crying and wouldn't get up so I got on the floor with him and laid next to him (I must have looked all kinds of silly) and he was shouting, "You're looking at me, Auntie Lying". I poked him in the tummy and said "That's because you're so beautiful, Ben, I can't help it..." and he actually started laughing as well.
I would never, EVER have done this... I never, ever HAVE done this, interacted with Ben in this way. Reading the posts yesterday gave me a bit of confidence to do this with a child I know and love. It's weird because even though I know Ben, I would still have been quite 'stiff' in my dealings with him, trying so hard not to upset him - or my friend. We went off to the café and he came to sit on my knee. I found it very hard not to cry myself as I hugged him because he's really never been one for cuddles from 'strangers'. I was thinking of the posters on this thread and thought that I must tell you.
What is it about people that makes them 'look the other way' and fail to interact with other humans? I don't know but, if I was guilty of not doing this with my friend's child for fear of upsetting him, then maybe it's not that people don't/won't accept children with SN, but more that they don't know how and wouldn't take that chance with a stranger's child? I was annoyed for my friend when others in the supermarket treated her and her children as 'invisible'... and thought, "Yep, that's me too, I've done that" and it really made me ashamed. I'd like to think that it's just that 'we' don't know how to interact with people with additional needs but I do know that there's no excuse for raised eyebrows and tuts; I'd never even noticed those. 
I'm going to do better.