This feature is my suggestion and it should be easy to implement. I want the ability to control the default visibility of a new SmartList Favorite. Today it defaults to System (all companies, all users). I want the ability to default that to "User" to help reduce SmartList sprawl. I've been recommending the use of "User" for a while now. Especially after a number of companies have asked if it's possible to just delete all the Favorites and start over.
If you want better control of the default SmartList Favorite visibility vote now.