Homosexuality in general was effectively banned by dominant platforms in the US for quite some time! It was a BIG DEAL to people when gay characters started becoming more common in mass media.

But note the order it happened. The privately-set standards moved with the times much faster than the government ones did!

Writers/tv execs/etc heard both the pro-equality arguments as well as the anti-homosexuality arguments and made their own choices as they were persuaded to. Many states, on the other hand, never legalized gay marriage before the court decision overruled their laws.

So that seems to show that we should empower private parties to have control over what their platform shows, over either the government or just the loudest mobs (there were MANY protests/boycott threats/etc from religious groups over this). The market gives this the advantage over the government here: the private publisher can test what sells, and over time is going to be increasingly forced to move with societal changes, while the government is much more likely to be captive to small-but-loud contingencies (especially in a gerrymandered world).