Did your Facebook account ever get locked?

Did your Facebook account ever get locked?

Annoyingly Facebook locked my account. I was logged in last night and everything was fine, but this afternoon they said, 'Account temporarily locked'.

Apparently, they don't recognize my computer and made me prove my identity. It kind of makes sense considering I am using a different computer than I was a month ago. But everything was fine on Facebook last night, so why ask me to prove identity now?

To prove identity, I chose to identify photos of friends, which was very easy and after five photos the account unlocked. But thinking about it, this is not a foolproof way to prove identity as really anyone can go over your friend list and know who these people are and get the answers right on the friend photo test.

So it worked out, but I'm still worried maybe someone else tried to access my Facebook account without my knowing.