Our managed networks are company property and if you try to install spyware on it you'll be kicked off. All of that is in the contract that you sign when you join the workforce. It also is not your personal network to toy with.
Anyway, the "head of the household" should get out of 1920 and find out about talking to your family like a person and using standard parental controls as validation, not weird policing. If you make your home a battle, people will find the stuff they want elsewhere and not talk to you about it if they have questions.