I've not followed the anti-vax movement, but I was thinking about the big push to get all girls on Gardasil. It seemed so contrived to me at the time. Now I wonder if it is a Trojan horse for future sterilization, when the ZPG people (oops, did we do that?) can do it selectively.
1. Make a killer virus
2. Use the ensuing pandemic to scare people
3. Shoot them up with a vaccine
4. Ensure that the vaccine renders most of the people who take it much less fertile than they otherwise would be while reducing their lifespan
Result:
Depopulation on a global scale.