No, the companies have the right to decide policy on their sites because they have property rights over the hardware. As a guest, or a user, you don't have a higher moral claim to dictate policy on their site than they do as owners. Besides, their bad policies, and alienating conservative groups is what drives people away from their platforms onto sites like steemit, and weakens their market dominance, and encourages competition. We should let them fail, rather than trying to save their dominance through legal coercion.