Now, I know that NSG is for the most part very scientifically oriented and look for objective evidence like me. So, my question here is: what common myths, misconceptions, or conspiracies do you believe are A) prevalent in today's society and B) potentially dangerous. For example...
1. Climate Change Denial. Fairly self-explanatory. Climate change has been proven (link is also in my sig) to be happening and to be human-caused, and the debate obviously needs to be on solutions instead of the validity of the science. Denial is extremely dangerous because it leads to inaction, which could lead to the displacement or even starvation of millions of people (to put it simply).
2. Autism is connected to Vaccines. Proven false (link also in my sig) and a hoax, the stubbornly prevalent belief already has led to outbreaks of previously-almost-dead diseases in the USA, UK, and other countries. Herd immunity is extremely important in the prevention of disease, so IMHO vaccinations should be made mandatory for all children who don't have an allergic reaction because there's simply no proof of any adverse negative effects.
So what myths, misconceptions, or conspiracies are having or could have adverse effects on society? Have at it, NSG.