Add "Limit sim appearing into other world" option!

As a long-time player, I am very sick seeing non-neighor sims appearing on other world. 
Appearing any sims on the festivals/events are fine, but appearing on normal days consantly? 

I think we should have an option:
- Limit residents appearing on other world
- or new reward Trait: "Love Staying Indoors" (restrict this sim appearing in other world)

option, because:
- The walk_by situation should limit sims within the world (for example, World X sims should appear only on World X and not Y)
- And walk_by should not appear anything if there is no sims in neighbor at all

- Limit Werewolf to Moonwood
- Limit Fairies to Innisgreen

You already have 2 options, so why not expand it?