How can I hack a facebook account?

[Dr Nooch]

You need his password.

Although its called "Hacking" when somebody pranks you on facebook, its not some crazy thing where people stare at 15 codex screens breaking into accounts. Its that you've left yourself logged in or they know you're password, log in and change the settings to your page and/or related shite.

The above guy suggested key logging software, but be aware that's highly illegal. Adding into that, you can just change you're password, and never leave your account logged in and you'll be fine. If you can't do the same to him (log into this account when he's away), just create a new page, and do the change password stuff, and it'll be fine.

Hope that helps,

Dr Nooch