Ah, well, I have to go with the last one.
If you feel like you can finally trust them or you want to reach out to them somehow I think it's best to just personally let them know what's going on without immediately drawing unnecessary attention to yourself. They'll be surprised, sure, but their reactions are enough to just make you smile. I say you should give it a shot if you really believe in them.
I, personally, didn't tell them right away. I waited for a while, I got to know 'em, realised that they were actually pretty cool and when it was April [which is Autism and Aspergers Pride Month] when the subject was brought up I just said "Well YOLO" and finally told the ones I trust the most. It was pretty cool!
Aspergers... Well, it might be a syndrome, yeah..
But it's also pretty awesome.
I say go for it, pal. Woo!
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"Shirahoshi: "But if you're a pirate, Luffy... Then aren't you a bad person?"
Luffy: "... Hm? ... Mmmm... I dunno, that's up to you to decide."
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Moo approves!