Well, speaking for trolls (considering I am one), you're giving them exactly what they want. Ignoring trolls is tough, I know it for a fact because I'm capable of getting under my targets skin just by them seeing my 'other' username. Not this one.
When a troll tries to troll me, I really don't care. I just ignore it. If they call me autist or something, just laugh it off and think 'whatever'. It's best not to pay any mind to those people. Rumors are what they appear to be, 'rumors'. If there's not solid evidence or factual data that can prove you're autistic - then why care?
It's the internet, man. If you can't bring yourself to ignore the things they say, I suggest taking a 'break' from whatever communities you're a part of. That's what I do on a regular. Anyways, the just about all the advice I can give on this matter.
Good luck to you bud~