bubbers,
I think something else was going on. The entire GP reflection area is pretty much off limits, i.e. no roads, taxiways etc (though I've seen, and immensely disliked, access roads on the runway shoulder). If you walk in front of the GP, you're enough of a disturbance to trip the near-field monitor (located a short distance towards the threshold) and turn lights red in the tower (not a good way to make friends), so something doesn't quite add upp in their 747 story.
I wonder what they do with those new taxiways going around the runway end. If they cross in front of the GP, an aircraft there should cause a disturbance. There are probably restrictions in place.
Edit: Oh, Dallas... yeah, plenty of places to put a 747 in front of the GP there. There should be restrictions in place.
