I am not arguing "every topic" of sensitive issue be put up for debate and scrutiny. I am arguing for one specific topic that presents the vibe of, people who are uncommonly enthusiastic about providing mechanical implementation of slavery and slave play in a PG-13 server. This need not become a witch hunt of, "well what else can't we allow if we don't let this?" That is not helpful. I'm quite confident in arguing that any of the characters who found compelling narratives exploring enslavement, likely could have had the same, if not better, results without (Slave) pinned to their name plate.
This is, again, not a matter of saying we can't do any edgy topic. As someone who has played edgy evil complex bad guys to goofy bad guys to hyper aggressive militant paladins, these things are often in my wheel house. I am saying, maybe, just maybe, we should consider removing the emphasis on proudly presenting slaves as a feature. It's just weird.
I should add that recent studies in game studies on players, characters, and roleplay suggest that IC/OOC separation is not innate, nor particularly easy to maintain without consistent encouragement and enforcement by the surrounding roleplay culture. And let's be real here, we must also acknowledge that the language of players today IC is more modern and casual than ever before. How often are players invoking IRL memes, making playful references to IRL topics or media, making funny meta-jokes, using game-terms like buffs or veiled terms for being "online" (on the ley, on-line), or using modern, familiar language in their every day In Character interactions?
We need to draw a line. To me, there is only one line to draw at discussion, with a very simple, very easy compromise: put the slavery tag in the description.