While it's easy to rubbish the idea of terrorism on New Zealand soil, and it's an idea that has been easily rubbished before, you have to ask if Mr Davies might have a point.
There's no need for him to rail against "the idiocy of the idiot who would publish this far in advance both route and location" in such a fashion, but perhaps a shorter lead-in to events would have made more sense.
That said, isn't the public seeing the royal family the whole point of the visit? Why would they bother coming Downunder only to keep their schedule under wraps until the last minute?
Tour organisers are quite right to assume royals fans will want to make plans to see the family, and making plans requires a decent amount of notice.
We could live in a world where no risk is too small, where terror lurks in every corner, but if we buy into that fear then, as they say, the terrorists have won.