1. "Don't vaccinate your children because vaccines cause autism" demonizes autism, portrays autistics as "damaged goods", and contributes immensely to psychosocial stigma.
2. It's the right thing to do.3. "Vaccines cause autism" is wrong -- in the sense of "incorrect". We have enough junk science in the field of autism even without the vaccine causation hypothesis.
4. The vaccine/mercury causation hypothesis is the nominal basis for a number of harmful quack treatments, such as chelation and the Lupron protocol.
5. Allies against the anti-vaccination quacks are generally highly motivated, skeptical, highly intelligent, and/or well-placed to help us fight other forms of quackery. The foot-in-the-door phenomenon applies, and the alliances formed accordingly can be used to our political advantage.
6. We can make a difference in the fight.
7. Sitting back and allowing one form of quackery to go unfought leaves the door open to others.
8. The anti-vaccination movement kills people. As the anti-vax movement targets the families of autistic children, this often means that it's us or our families who get sick and die.
9. Killing or recklessly endangering other people in the name of preventing people like us from existing is most certainly not acceptable.
10. Anti-vaxxers guilt-trip the families of autistic children over vaccinating their autistic child. This can have tragic consequences for autistic people.
11. The anti-vaccination crowd often acts as a concerted mob, bullying and acting to exclude people who disagree with them (and especially those on the spectrum who do so). This greatly adds to the difficulties in having reasoned discourse between autistic individuals and parents, and contributes to our exclusion from the discussion about autism. (Thanks to Kim Wombles)