There are indeed some factual mistakes floating around, mostly around covid-is-just-a-flu and the-earth-is-flat discussions.
But usually shit hits the fan in social issues of poverty, homelessness, abortion rights and such.
Alas, there's no hard science in most of these issues. There is a bunch of plausible-looking speculations, philosophical theses and general thoughts. Pretty much like 17-th century physics, in 18-th century biology or 19-th century medicine were.
As for the ideas being harmful... What do we do with potentially harmful, yet factually correct statements, and does the same logic apply to beneficial, but factually wrong ones?