First post:
"I'm thinking that breeding out illness and disabilty is a great thing"
Later post: "Amber I do not, and at no point in this thread have suggested that 'people like you' as you put it, should not be allowed to live."
What did you mean, then? How would people like me in the future be 'bred out' and yet be allowed to live?
If there were a choice to take away just the worst bits of the disability, would I like that? I've no idea. None at all. What would make a huge, huge difference is the other people in society not causing us immeasurable problems by refusing to allow us to have an environment we can cope with. We can manage that right now. But we don't. Instead, some people are calculating how to eliminate us.
The testing that simply says yes/no for autism might be only 5 years away. At that point, the chances of people like me making it into the world become very significantly reduced. The quality of life for the rest who are allowed to be born won't be a jot different. Is this a huge step forwards for humankind? No. Not unless we have a test that can find only those individuals who have a very very high probability of a dreadful quality of life.
I know plenty of non-disabled people with an appalling quality of life. I know plenty of people with illness or disability who would rate their quality of life as being very worthwhile.
We need to be very, very wary of judging people on whether they have a disability.