Adults choosing not to vaccinate themselves is stupid but fine, adults choosing not to vaccinate their children is neglect - pure and simple.
I consider it a parental duty to look after one's children using all means at your disposal - modern medical science has given us the ability to prevent a whole pile of diseases that could otherwise be deadly and it's often very very simple to take advantage of such treatment.
It's forgivable to not vaccinate where you don't know better (despite all the public education on the subject), or where you have been deceived by bad science or where you lack the resources and it's literally a choice between food and drink or medical care........ but at least for anyone reading this i'm betting you have the ability to read up on the subject and that you have the financial resources.
There is perhaps a bit of paranoia involved with vaccines as many governments make it mandatory, and in this community in particular that won't sit well. I would say that government mandate does not transform a good idea into a bad idea - vaccinating your kids is still a duty even if the government mandates it, and vaccinating yourself is still a damn good idea.