I gather this forum is meant primarily for autistics, particularly those with Asperger's Syndrome, a population which is threatened and often directly bullied by Autism Speaks. Also, everything I've heard from and about Autism Speaks suggests they have very little sympathy for ("high-functioning") autistics themselves, but rather direct all of their attention to the parents and other NTs affected or inconvenienced by autistics. Generally, when I read Autism Speaks' statements or discussions, I feel as if someone has just called me subhuman, as if I should never have been born, which seems to be the gist of such statements as 'autism should be eradicated' and of Autism Speaks' general disdain for autistics and unwillingness to listen to them.
That said, I'm sure it would be nice for so-called Low-Functioning autistics to be cured (or however you want to say it), but pre-natal screening would prevent them from even being born, not to mention reduce the incidence of autistic creative and scientific geniuses, or just people of average intelligence who happen to function differently.
I think an after-the-fact cure for autistics who are suffering severely from internally caused symptoms is OK, but autistics with that "transability" mentioned earlier should be nurtured and, I think, allowed to "act autistic" a bit too when it doesn't harm anyone, just as gay people are allowed to act flamboyant.
At any rate, all-out genocide, which pre-natal screening would likely cause, is unnecessary, unjustified and inhumane. Autism Speaks often treats us like animals; that's why many of us dislike them.