There are so many sims now that behave mischievously even though they don't have a single negative trait!!! I hate this so much because I know every interaction can't be perfect but it's so annoying ...
Ideas
Hi Bunaaa
mischief is not necessarily something they do when they have a negative relationship. Those are mean interactions.
There's already a thread here for insults/mean: Autonomous Insulting (Patch 1.108.349) | EA Forums - 5018647
Is that what you are seeing ?
Could you list the interactions the Sims are doing ?
There's a thread for mischief here: Goofballs obsessed with mischief and etc... | EA Forums - 12116596 but that's for goofball trait.
There's also a bug limited to pranking toilets: [BH] Sim constantly doing 'Prank toilet' interaction | EA Forums - 12479539
