Well, is this such a bad thing? I mean, the 'nut jobs' will be selecting themselves right out of the gene pool, right?
I know you are joking but yes it really is such a bad thing. The problem is that some people cannot get vaccinated due to things like allergies to vaccine components, a weakened immune system or other health issues. The more people that get vaccinated the stronger the herd immunity and the less chance an unvaccinated person has of exposure. These idiots who don't get vaccinated increase the risk to both themselves and the people who through no fault of their own cannot have the vaccine administered. If I may be so crude, they are basically peeing in the gene pool and endangering others in the process.
Plus you have to consider that most vaccines are administered to minor children who legally cannot decide for themselves whether to get the vaccine or not. So basically a scientifically illiterate adult is preventing them from receiving standard medical care. Personally I think that amounts to reckless endangerment of a child and in some cases where the child gets ill and dies I think it is basically manslaughter.