I don't think that is true. Giving the fringe a platform makes it easier for like minded people to find each other and that allows them to create a nice little echo chamber where they can pretend their ideas and concepts are legit and backed up because 'many others feel the same way'. Free speech advocates believe that somehow everything that can be said should be allowed to be said but this does not - in my opinion at least - extend to each and every medium. Handing every moron a megaphone is not a good idea.