All right, so here's the announcement. This isn't so much an ironclad rule, as it is a public call for awareness. There have been concerns about the direction of the forum as of late, ie., shitposting, and an increase in vitriol. It can breed an environment that drives users away and encourages pandering to the lowest common denominator.
This is where a general discouragement of words like "autism" and "faggot" insults, or "jewtube" and stuff like that comes into play. The important part is the context: insulting other users. So from now on, we'll slowly be nudging people away from that, especially if it gets to the point where it completely overruns the thread.
This is not that different than just curbing shitposting, it's just another part of encouraging a productive environment. Mods already warned for saying things like this in the past. I remember one such incident with Buster myself a while back. It's just being put on display now.
There is no list of words to reference. That is impossible to put together given the flexibility of language. Just use common sense, and you'll get feedback from mods about it if it ever comes up. It's not going to be like, "You used X word once and you automatically get hit by a warning" like there is a machine set up to activate the moment it happens without context.