@Lenny_Ogg and everyone else plagued by Sharing is Caring: In addition to cheating away the NAP, you ALSO have to remove the hidden trait from several sims.
The problem is this: When Sharing is Caring goes into effect, the sims in the neighborhood get a hidden trait that allows them to steal autonomously like kleptos EVERYWHERE they go, not just in that neighborhood.
When the NAP is repealed, the trait goes away. However, if sims move around, they take their hidden NAP traits with them, they do not get updated automatically. I had this happen with a sim from a Good Old Times neighborhood, she got fined at uni, despite the uni neighborhood not having that NAP. That's how I learned about those traits. I don't know the trait names on top of my head, since I add/remove them with MCCC, but can look them up later.
