My dude, an Indian is going to call your Apple-using grandmother and tell her that he works for "the Microsoft" and he needs her to give him all her banking details, or go to a bitcoin ATM, or buy a stack of $500 gift cards, and she's going to do it.
The sensor in her macbook lid does not matter! Get real.
You're wack. Do you think a locked down laptop lid sensor will stop them from spiking your tea with polonium, or shooting you with a ricin BB, or breaking into your home when you're asleep and jabbing a needle into your neck while holding a pillow over your face, or kidnapping you and breaking your bones with a sledge hammer until they've gotten their rocks off?
This laptop lid threat is fantasy. Get fucking real.
The sensor in her macbook lid does not matter! Get real.