Maybe you could use the claim of "authentic athletic metrics" to troll them. Get fit people to come in and take all sorts of assessments on strength, agility, speed, endurance... but also bring in whatever HAES fat fucks you can find. Even let the chub bitches recommend who they want. Do the same for the fatty and put those stats into the game as character attributes. See how many people want to play the fat character, and how useless they are comparatively. It might save a generation of young people from obesity.