Its a toughy for the most part. Even on the FB or other pages where there are vaccine information pages, you get pro-vax lobbyists flouting their qualifications, telling us we're stupid, they are scientists, biologists etc and harass the crap out of others... they pick fights... and I guess its not a fight til you bite back, but still... this is life on so many topics. Defense is the first act of war. I think the answer is to not resist what is, acceptance that we all have our views and it's not you with the problem, its them (and not create one for your own), and to have peace with our own choices. Only we create the war when we resist. I'm sure those people love it that they created such a reaction and attention - and therefore more attention on the topic.