Ideas
Finally got around to posting in this thread - I am a modder and noticed a high level of inappropriate mean interactions (and autonomous fighting) after the Adventure Awaits base game update. I dug into the coding to investigate why.
It appears that a number of tests on sim autonomy are pack-locked to Adventure Awaits, and if someone doesn't have the pack they trigger autonomously. This includes many mean socials and interactions. Autonomous fighting was partially fixed in a new update, but the larger issue with mean interactions remains because there's a specific testset intended to check and see if someone is on a getaway where the interaction is encouraged and - when the player does not own AA - the test automatically passes.
I was able to fix this bug in my own game by taking the Adventure Awaits testsets and flagging them as base game. I don't own AA myself, and this has fixed it.
The mod I made for this is available as "Flirting and Mischief Autonomy Fixes" and you can find it on Itch.io and on Nexus. The modfix also includes the mean interactions, despite the name. The game is pretty much not playable without this fix (unless you own AA, disable autonomous mean socials with MCCC, or turn autonomy off, pretty much.)