It's the dunk tank.
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He claims what he is proposing is "less morally questionable" yet in the very next line he states he wants something "truly horrible" and "evil itself." 
Already in a CW thread so here goes. CW anyway:
I heard a story that some kind of very early online game, some kind of mixed graphical/text RPG, was really dedicated to adding as many things from reality as possible. Devs would just add any interaction they could think of. So like different styles of fighting, pickpocketing, shaking hands, riding under the bottom of a wagon, or whatever, all this was easy to implement as it was mostly just text to display or numbers to change, and if necessary could be handled by a d20 roll or something.
So someone had the idea to add sex. Sure. They added it. But some asked, what if... a player chose that option and the other person... refused? The devs were persuaded to follow their sort of ethos about allowing any real thing into the game. So they added rape next. Handled by d20 rolls I assume.
Well, pretty soon 90% of the player base was role playing rapists. All their little profiles were about why they became rapists and why they rape people. That's all the game was anymore, just rapists running around, constantly stopping people so that the text would pop up and describe them committing rape. Every time you'd go to a town to buy arrows or whatever, you'd wait around getting raped
The sheer uniqueness of the feature drew that sort of person to the game, and drove most of the other people out.
Once that feature was put in place, I assume anyone that said it was a mistake or to remove that feature was called whatever that era's version of a wokescold was and the removal proposal was seen as censorship from the nanny state that is against the very mature grown-ass Vincent AdultMen in the room. 
Reminds me of HellMOO, though that was post apocalyptic and made in the early 2000s by a bunch of Something Awful and 4chan users to be as edgy as they possibly could be. Otherwise it was a MUD/MUSH like what you describe. Actually there was one big difference: actually engaging with the sexual mechanics was considered creepy and cringe by the community in general instead of being celebrated.
Turns out most peeps that engage in multiplayer games don't do it to encounter SA, huh I'm shocked