I think the real disagreement is whether people can RP something inaccurate to the ideal (or worst in the case of abuse) and do so without being ignorant ooc or contributing to bad things happening RL.
As I have stated or tried to many different ways, without comparing anyone to a known and admitted ooc predator, people play all sorts of things for a wide variety of reasons, people with similar RL experiences may choose very different comfort levels with it in RP, even knowledgable people choose to not portray things in RP with best accuracy. I don't believe that to mean that these people who don't RP out best practices of parenting, consent, behavior in response to stress or frustration, ect are by the fact of doing so adding to the atmosphere that causes such things to happen RL.
The issue of mushers getting together (which yes, can and does happen---a lot) and their expectations of RL vs what they have played out on a mush is IMO a different issue. Regardless of how you RP with someone online, even if your play has ONLY incorporated best practices IC I really hope that the players meeting exercise some common sense safety guidelines. I know some people who have gotten into unsafe situations even though they knew the best practice rules and exercises them in their online play with each other, and thought they didn't have to be cautious when meeting in RL. There are a ton of people who talk the talk but are still /bad/ people out there.
What I was perceiving (and I do not think I was the only one), was a shaming of people who choose to engage in certain types of RP because nobody properly educated would ever want to play out anything different. Maybe the miscommunication started because lithium meant to restrict that solely to D/s play, but because the topic has expanded to abuse in general, I thought that they felt that way in general? However this is a pretty common argument and friction point on mushes, the Who would ever want to play X unless they're stupid/stunted/ect? thing.
So it may be that we do see mostly eye to eye on things, just not on whether D/s play should be in a different category of expecting the community to portray it healthfully/accurately and if that makes people extra specially bad people if they don't.
I think @lordbelh is doing a lot better job of communicating about that than me though.