Not sure if this is a new idea, or a bug introduced by Core 2.0 beta.
When playing games that don't support the Touch controllers, the guardian system is disabled until the game is exited. Once back in Oculus Home/Dash or when loading a Touch enabled game the guardian system works fine again.
I'm sure that before Oculus Core 2.0 beta, that loading a non-Touch enabled game wouldn't disable the guardian system?
So I guess this is either a great new idea, so please vote, or it's a bug that needs fixing, so please vote :-)