https://en.m.wikipedia.org/wiki/William_Shaw_(laboratory_own...
Leave it to HN to fall for grifters, but then again I suppose this must just probably just a massive conspiracy by the big bad Illuminati or something to profit off mainstream understanding of autism and we should trust the “science” this time. (To be fair, I can’t find anything that points to the main author being nearly on the same level of quackery, but having this guy on there hardly instills faith)
1. Lawsuits are completely irrelevant to what is actually causative. E.g. there is essentially no evidence silicone breast implants are carcinogenic, but that didn't prevent implant manufacturers from going bankrupt due to legal judgments.
2. From your own link: "The studies in people are observational. Some conditions that might prompt acetaminophen use during pregnancy, such as fever and severe infection, are themselves associated with autism and ADHD in children." Observational studies may be a good point to start further investigation, but given how many observational studies have been thoroughly debunked from a causative point of view, they should be completely ignored as evidence IMO.