Alternative medicine can sometimes be interesting, but it is important to remember that alternative medicine that has scientifically been proven to work (and not just on the level of a placebo) by a reputable organization is just called medicine. But personally, I don't mind it if it's not completely ridiculous. A potential solution would be to migrate such content to a new tag such as "alt-health"
Personally, I think anti-vaxxers need to get out of the "science" and "health" tags completely. It is clear that they value neither.