OK, so this isn't practical (yet) but here's the idea:
We're moving to an increasingly pluralistic and diverse society, and now this is including neurodiversity. Traditionally, societies were based on differentiating "Us" from 'Them' by having elaborate and largely arbitrary customs. There's a lot of discussion of writing 'Operating Manual' for ourselves, which I think is a really good idea.
Computers have all kinds of different standards, and go through 'hand-shaking' routines. Humans do it too, but it's difficult if our systems aren't similar.
So wouldn't it be cool if we could have a device that could exchange protocols with someone we meet, so we know how they feel about touching, eye contact, small-talk, and it could be biometrically self-adjusting for some things. Kind of like a Universal Translator for non-verbal communication.
HaHa.. I just thought that sometimes I want a car alarm built into my clothes. "Please step away from the aspie. Step away from the aspie. Now."
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"Yeah, I've always been myself, even when I was ill.
Only now I seem myself. And that's the important thing.
I have remembered how to seem."
-The Madness of King George