I direct your attention to this question: How to import contacts from symbian mobile to android mobile?
It has, as of this moment, five deleted answers. All are of the "me too" or "thanks that worked!" variety.
And yet, the question isn't "Protected".
It was my understanding that if a question gets three deleted answers from low-rep users attached to it, it automatically gets "Protected" status to help prevent these sorts of non-answer answers.
Did the automatic status change not happen? Or was it removed for some reason?