I'd like to see you try this in a court session.
That aside Steam is not the only party pushing for "morally acceptable" contents, they use 3rd party payment systems... the same that are the reason for Patreon is hawking down on their moneybags/developers.
Don't get me wrong I really hate that practice but it's a matter of fact that there is a system that censors far more than any lawyer without a stake in the process would attempt to push for.
Ask (assuming you're truthful with the nuances) any lawyer if your case would even reach the court.
3rd party payment processors acted at the behest of "Collective Shout", an activist organization, not government.
They also didn't target games due to off platform content/mods, because they literally couldn't, they targeted on platform hentai games specifically. And what happened was, Steam called their bluff and embarrassed them.
Patreon simply caved in, nothing else to it.
Basically, liability of illegal content falls first on the Person(creator), then on Platform(host or even parent host(s)) and then on Internet Services(ISPs, CDNs). Whichever entity the law has jurisdiction on in that chain, would have to take action.
So in this case, Person > File Host (for the mod if not self-hosted) > website's Platform > and finally Internet Service(s).
I get you, I remember gamergate like it was yesterday, and this felt similar to me, except this time Steam itself stepped up.
What are some things you all would like to see in mad island before it reaches its 1.0 release?
Mainly the return of detail for sprites, zooming in makes them look pixelated (with bilinear sampling) atm. I know it was done to reduce the size, but still, I think it was a bit too much...