I'll take your word for it since the only ITAR I know is a Russian new agency. I'll bet that arms dealers (foreign and domestic) are intimately aware of its requirements though. So why would one of them openly advertise the nature of their business so blatantly? The requirement is absurd in its own right. The application to a domestic business is even more absurd.
Since it now looks like its going to cost real money, my guess is the Dell people are making the same point to the Commerce Department right about now.
There are a half a million or so shipping containers on American loading docks on any given day. Inspecting them all is simply not an option unless we're willing to set up a soviet style bureaucracy with all of the cemmensurate delays and corruptions. Requiring businesses to comply with a regulatory system of paying attention to customer destinations and declaring international weapons shipments - agreeing
not to ship to non-friendly nations - is how a good and free society operates. Dell wasn't paying attention, but they erred on the right side.
Terrorism could very possiby force us to implement that soviet style inspection system. It's already happening in the passenger transport business. If it happens in the freight business, the economy could very well collapse. This is why we must crush terrorism, lest our entire system of freedoms become compromised beyond recognition.