I'm not sure how their existence improves science, considering the questions they often demand of scientists come from no area of scientific rigor or examinatio

I'm not sure how their existence improves science, considering the questions they often demand of scientists come from no area of scientific rigor or examination. If anything we've started seeing the clear opposite, where the climate change deniers or anti-vaxxers have been outright suppressing scientists and reports that disagree with their skepticism.