Facebook Account Temporarily Locked or blocked:::....
Isn't frustrating????
Reason:
A) May be Facebook making an improvement in the database and the account get "Locked" are stored on. During this time,it may not be able to gain access to the account. It may last for an hours. If this doesn't work, try submitting Facebook form.
B) May be Facebook has detected suspicious activity and has temporarily suspended due to security precaution.
C) Randomly adding large number of friends and sending continuously message to your friend list....