Some of the posts on here are really quite ignorant, autism as a personality trait(?).
But that is what's happening. I see a parallel between...
I'm a female who likes woodwork/climbing trees/etc, having short hair and wearing trousers, so I'm therefore trans
and
I'm shy, hate smalltalk and have some passionate interests, therefore I'm autistic
These are both cases of personality traits being used to self-identify into cult-like groups where the original measures for those conditions were very different.
Both of these sets of traits apply to me and I can see how very easily I could self-identify as either / both.
As it happens, I hate bandwagons, I'm not a joiner-inner, I don't have any desire to label myself and I also think there is strong evidence that neither of these labels really does apply to me. But I could right now announce to everyone I know and on Twitter that I am of these groups and I would get a vast amount of praise, support, welcoming, validation and be made to feel like I "belong" in a special group - and then I could start using that position to tell people off and assume moral authority.
OF COURSE this situation attracts lots of people for other reasons - like low self-esteem, history of abuse, lack of supportive family, loneliness etc.