You are talking about an extremely vocal minority, who inevitably ends up creating echo chambers.
Like everything on earth there are both good and bad vocal minorities. I follow this heuristic about vocal minorities: ignore them when it comes to trivial issues. Online vocal minorities like fanboys who harass directors, writer, or actors are good example of this group. Same goes for the people who constantly complain about Google shutting down some free products. OTOH, I keep close eyes on activists, who are vocal minorities and are fighting for important issues. Activists might not be on the right side of history on every issue, but these are the people who fought for civil rights, LGBTQ rights etc., often at their own personal expense.