[empyrrhicist]

"Anti-vaxxers" generally refers to people claiming vacccines cause autism/magnetism(?) etc. Most people support bodily autonomy (though most also think that choosing not to get vaccinated should come with additional responsibilities/restrictions so those who partake don't fuck everyone else over).

For my 2c on the comparison, anti vaxxers do more harm, but dark matter deniers are annoying as hell, because (IMHO) they debate with straw men. There's no church of LCDM, its just the current best set of theories until something else comes along. Alternate theories are routinely considered, attempts are being made to falsify or constrain LCDM all the time, and precisely nobody who actually knows anything claims we have any sort of comprehensive understanding of what's going on.

Seeing a bunch of armchair skeptics bash the theories as if they were mindless dogma is annoying AF.