Temporary solution for those using mods -
HERE by NateTheL0ser. Description:
"So this is apparently a real bug instead of what I thought was just MC Tuner going way too ham.... I took it upon myself to wrangle the test set for autonomous mean socials because what business did my sims have insulting someone they were just kissing and having a great time with.
This mod has a new test set inserted just about everywhere in "testSet_MeanSocialsAutonomous" that's present in most, if not all mean interactions' "test autonomous" lists. Now sims who are actually rude will be rude, with some custom traits also accounted for (if they have alien/vampire hatred traits from Misery Traits, for example, they'll have no issue autonomously starting shit with the occults they hate so much). Sims with traits like Good or Compassionate will abstain from this autonomy, and sims without any special traits still need to at least have some reason to go about insulting and picking fights."
