Someone finds your Facebook and makes a joke based on one of your posts you

Freak out and call them names.

Are indifferent and don't care because Facebook isn't like they are breaking into your house and killing your loved ones.

Act like a responsible adult and let them know that you didn't appreciate them going out if their way to find your Facebook.

Don't really care because you've got your security hiding all the things you don't want strangers to see.