If you're looking for general information on how to protect your Facebook account from hacking or if you're interested in ethical hacking practices (often referred to as "white-hat hacking"), here are some general guidelines:
Protege tu cuenta, educa a tu entorno y recuerda: un verdadero bromista no necesita hackear nada. La creatividad y el buen humor siempre ganan sin necesidad de violar la privacidad ajena.
Conclusion
When they ask how you know, just say: "I saw you type it... with my eyes. 100% manual hacking."