+1 for this.
It's a real security issue.
One never knows if a guest sets a lock code for their phone.
Plus the app only asks you to login in once and then from there a user, any user with access to the guest phone can open or close my door with no need for further credentials/codes.
If a guest does not set a lock code for their phone that means anyone that gets their hands on the guest phone and the app can open or close my doors from anywhere in the world.....
Local only access for guests should be the default and the admin should have the option to enable remote access if needed.
Except for this concern so far i'm really liking the product. Very happy with the install experience!