That's my point exactly.I encountered someone years ago on an internet forum claiming to be a nurse. She then told me that I can't possibly have Autism. We don't know each other at all. Funny how people who actually know me, will tell you different.
And Mumsnet is dreadful for it. Armchair diagnosis within seconds of a post.
Dementia, autism, you name it, it will be reeled out. Bingo.