Do you think the intention is to keep the player off balance?
I have often walked off a course and thought it was either more or less difficult than it "looked", but I can't seem to come up with any at the moment.
I think the 6th at PV looks incredibly intimidating, but can be negotiated fairly well by just about any caliber player with a decent drive (not a best ever drive either).
#7 appears fairly innocent, but can absolutely kill people if they don't pay attention.