fb's issue/vulnerability

Hi there,
Today, I noticed that you could add mail adresses to your fb accounts even if you don't own them.
If you don't understand.. go to facebook and go on the search thing as you would do if you were searching for a friend and type "[email protected]", now watch the result (you must be logged in while searching).
I need some help on a certain step that I couldn't get done yet, experienced members can feel free to PM.

u can add tht With your previous address but they will send u a confirmation mail to confirm u r id