Really - style over substance? I'd rather be treated by a doctor who bases their decisions on good clinical practise than off the wall hearsay.
Crumble, volcan and etc, you may not be saying outright "don't vaccinate", but you are sowing the seeds of doubt. There's a book about this sort of behaviour - merchants of doubt how the anti tobacco campaign was derailed by a handful of the pro smoking lobby by "sowing seeds of doubt" despite overwhelming evidence that smoking is bad for your health (same for global warming, acid rain, ozone effect). These merchants railed against Rachel Carson (remember her - silent spring and all that).
What the "anti vaccine / anti MMR" mob are doing is not openly stating a case, but rather "sowing seeds of doubt" against overwhelming evidence, that MMR works, is safe and offers the best protection. Throwing in red herrings like vit A, nutrition and autism is simply using the same tactics the pro smoking lobby used when they tried to fight doctors over smoking. They used to say it wasnt cigarettes causing lung cancer, but poor nutrition (sound familiar), living near factories and poor lifestyle choices, elements of which are true, but derailed the issues and led to huge doubt over the links. it took decades for anti smoking legislation to come in as a result. The same method is used by climate change deniers, "sow seeds of doubt" - is it really man made??? Ask the questions enough times and even without the evidence, people will question the knowledge.
Using thes tactics, you're aligning yourself with big tobacco and big oil. If you want to peruse this path, fine, but look at who you model your behaviour on. Not to mentio those who claim Obama is a Muslim stooge born outside the US .....