Where did I mention the word 'permanent'? Now you are just putting words in my mouth - again. I've already conceded in my second post that it can be worked around in many ways, though only by those that know how to do it. Not everyone that gets banned does infact know.
Nothing is perfect but I've seen this work and it continues to work as we speak. We can sit here and dispute this for another five pages but that is the most pointless thing we could do. My last comment in this thread is 'seeing is believing'.
