This thread is a loss of time. From my point of view there are few things worth to note however.
1) Had it been moved to JB, and not edited, part of the polemics wouldn't got a reason to exist.
2) Had the US gov.nt released full information on the attacks, at least in form of simple facts like FDRs etc, people would not have basis to formulate idle speculations.
3) This may be a very personal opinion, but I disagree with the following:
Originally Posted by John Farley
SUPERMMM
Some of the technicalities of how aircraft are controlled by ATC and in particular how they are identified and monitored is information that could valuable to someone who wanted to disrupt the system. But perhaps that had not occurred to you?
How futile is to say that? The "technicalities" are perfectly public. For a person of average intelect, with access to the Internet, it would take probably less than one day to acquire a good knowledge about ATC procedures in general.
You must never think that something is implicitely safe because is complicated, require training or not much discussed in public.
As long is not classified people can and will get to know how it works and can be exploited.
If you want a safer system, design for it, do not rely on the fact that the current one is not discussed, because even if you don't, someone else will.