On Facebook there was this 'have you read the top hundred books' thing doing the rounds. I did it and posted it on my wall and it went like this, over 2 days:
Initial comment by me to nobody in particular: 6 how flippin rubbish is that? Can I include them if I've seen the film?
Her: no!
Me: But they can't be that good as books because otherwise I would have finished the ones I started. I love reading and have read gazzillions of books. It's obvious that these ones don't cut the mustard. Can I add all my half read ones together instead then? ;)
Her: coz being even with everyone else is like really important isn't it?
Me: Not at all, I was only joking. I know I have a problem with reading books that don't interest me. It's part of my condition, my brain just switches off and I can't engage with them.
Her: what's your point though? that even though i have read more of these than you, you really have read more than me? or that the list is wrong? it's only a list!"
Me: Honestly, it was meant entirely tongue in cheek. I didn't mean to offend you. I'm sorry.
Her: well it sounds like sour grapes to me.
Me: I really sorry, but I just don't understand why you are responding to what was supposed to be friendly banter in such an aggressive and nasty manner.
Her: and who appointed you in charge of which books are interesting or not? eh? other people are only allowed to enjoy the books you deem interesting!why can't they be that good? because you didn't finish them? what about those who did? or are you the benchmark for book appreciation?
Me: Whatever I've said to upset you, I'm really sorry, it was not intentional.
Her: oh FFS! i know you're autistic but you're so blooding arrogant and patronising. the world does not revolve around you, stop being so bloody selfish.
Me:I'm sorry my comments have upset you, that was absolutely not my intention. Beyond that I don't know what else to say
Her: can you not read/see how arrogant and patronising it sounds????????? i AM upset kladdkaka!!!!! i am upset!!!!!! it's not just you that is made to feel upset by other people. omg!!
Then a few weeks later she removed me as her friend.
The only other comment was from my brother in reply to my second one. He said my gazzillions don't count because we're talking about grown up books, not Rupert annuals and that I could add as many half read ones up as I liked, it wouldn't change the fact that the average house brick was smarter and more cultured than me :o
Was what I wrote really so very bad? 
(Aspie photographic memory comes in handy sometimes)