I would say that yes that is why walking exists, yes. BUT maybe the big difference is that you don't know what the original intent was, so walking may be intended from the beginning or not, maybe they originally intended to go earlier, then changed their plans, who is to say, so in that case i say no, they aren't making a res beyond their 11mo window. But it may turn out that they traveled beyond what the original res was made for.
Again. No one is making any reservations outside their window, no one.!!
They are making it INSIDE the window, then rolling it forward, maybe that's the confusion?
And that may be the issue, you asked it wrong, you asked if they could break the rules, so of course the answer is no. lol