Mintmaster
Veteran
I'll agree with you for the vaccine issue: The best way to stop that movement is to rile up the vaccinators and point out how the anti-vaccine movement has vastly increased the number of measles cases and how mutations could pose a threat to all of humanity. The reason is that there is a majority there, so alienation and ridicule powered by facts will actually work.The best thing we can do, really, is tar the whole movement as stupid and moronic (because it is), making it difficult for those who are either marginally attached or who haven't gotten into it to want to be associated with the movement.
The problem with AGW is that you don't have the luxury of a clear majority (you do in the scientific world, but that's different, and people who are wrong there are eventually proven so). People are pressured by the anti-AGW movement because they are surrounded by it, so riling it up in fact makes it harder for undecideds to break free.
The only way to convince those people is to give them a hook. If I was surrounded by conservatives, I would say I'm not against AGW because it's the best way to make lefties accept nuclear power; it allows America to expand its leadership in renewable energy technology and industry; it helps the auto industry (GM, Fisker, Tesla), etc.