I appreciate that Ted. I do have a rather extensive understanding of mechanical fasteners myself. I do not claim to say that nails are better then screws, as it is not universally true.
I was merely pointing out that your original statement was rather pithy to the point of being too general. Like it or not, people will tend to take comments you make as gospel around here and disregard most of the context surrounding it in the rest of the thread.
Saying, Nails are never a great idea can give people the wrong impression.