In reply to Rob Seymour:
A couple of my regular climbing buddies were encouraged to "move along" by site security when the filming was taking place.
I am not clear whether they had (inadvertently) strayed into shot during on of the panoramic shots of the Chief Scout chest-beating or whether they had momentarily strayed too close to the catering crew's helicopter-carried buffet snack operations.
I was on the Main Cliff a couple of days after filming and was rather perturbed to see a large red arrow painted on the sea level ledges below Autumn Flakes/Nameless, any suggestion that the film crew had placed sighting marks for the great death-defying abseil are of course utterly inconceivable. Huge arrows are painted at the base of cliffs all the time, naturally .... I mean, how else would we navigate to Christmas Crack?