Yesterday night i was using eBuddy mobile IM client to chat with my friends. After few minutes of usage eBuddy gets clashed with Facebook chat and i could not continue my Facebook chatting. So i disconnected it and tried to log in again. But I could not do it with my mobile. So i left the plan of chatting with Facebook friends from mobile.
After few hours i opened Facebook in my PC. When i signed in, Facebook reports me saying "There was a unfamiliar operation" and asked whether i am familiar with that event. Finally i gave Ok, then verified a captcha (I think ,you know how difficult is it to verify a captcha in Facebook) and went to my Facebook homepage. After that only i came to know about "How secured Facebook is?".. Really a hacker needs to do a lot to get a Facebook Account's password and informations.