Your assumption of current social media is the only way for mass to run content is not necessarily true. One alternative I would imagine is hosting companies to

Your assumption of current social media is the only way for mass to run content is not necessarily true. One alternative I would imagine is hosting companies to develop one-click solutions for grandmas using cellphone to create their own websites / blog under their own domains. They can choose whether to allow strangers post comments on their websites. Of course there's more possible alternatives.