I think all of that could be easily implemented by logging into different accounts by entering a different password/passcode. So UserA:regularPassword would be

I think all of that could be easily implemented by logging into different accounts by entering a different password/passcode. So UserA:regularPassword would be one’s usual account, but UserA:obviousToGuess123 would actually log into UserB, and UserA:ohshithelp would log into UserC which has a startup script to secretly call police or whatever.