I just send out 500 friend requests in facebook.But when I tries to add more friends,it is showing - "Contact Importer Error" "You have exceeded the limit of uploading contact files! You are temporarily blocked from uploading contact files. This block will last anywhere from a few hours to a few days." Why is it so when I see many people easily adding more than 1K or so friends per day.Also I am not seeing that facebook friend requests turn into friends.I am getting like do I know you,how do we know each other etc. Also can someone help me if there are any facebook message autoresponders?