I miss a child protection / keyboard & trackpad lock / cleaning mode feature that simply shuts down all keyboard and trackpad inputs (either for a certain amount of time, or until I turn off the function again, for example using an external mouse or keyboard) ignored. Why? Example: Every time I talk to my brother about FaceTime, my kid wants to touch him. But what happens? Exactly, all keys on the keyboard are pressed down. The same problem I have when I want to clean my keyboard.