No, it doesn't. It makes people discount anything you say because all you're trying to do is draw attention to yourself. You end up being ignored and nobody cares about your message since the things you say are terrible.

Autism is not a bad thing, but they are acting as if it is.

How would you feel if the campaign said: "Drinking milk makes your child gay?"

Would it still be okay because it gets people thinking about their consumption of animal products?

Yes, they accomplish their goals, but (to come back to my first comment) is it really the right cause or does it alienate people?