It would be great if there was a way in the emby dashboard settings to assign a 4-digit pin code for parental controls. Then that code could be assigned to specific channels. Then if anybody in the library (using the apps) tries to access those channels they are promoted for a password. You can choose what channels to add and what not to, in the guide data where you map the channels. Just give a box to click like (add parental control) and it would assign the pin request to THAT channel.
Unless this already exists?
This same code could also exist on shows or movies you assign the controls to.