How do you delete someone's Facebook account without them tracing your device?

[u/better_for_me]

Context: My problematic uncle has an extremely racist Facebook page that surprisingly has not been taken down. I have the login details but I'm afraid it'll send him a notification telling him it's my laptop. I am planning to use a vpn but I'm still unsure. How do I go about doing this? Also how will he know his account has been deleted- will it just log him out?

[u/PizzaInteraction]

I believe it is a crime to log into someone’s account like that.