I cannot believe I am actually about to say something vaguely positive about our monarchy (not exactly a common occurrence with me, to put it mildly
), but here goes.
It's a very high-profile wedding, in the middle of a grim recession, with an insane amount of administration/paperwork to be done: every single aspect of their expenditure is going to be scrutinised and criticised to within an inch of its life (mainly by grumpy people like me, who think that them running off for a quiet civil ceremony somewhere would be a far wiser use of taxpayers' money
). Damned if you do, damned if you don't. I honestly don't see any problem with faxing the save-the-dates. It's cheap, it's efficient, it's straightforward.
I think the main concern is how many people really own a fax machine anymore?
We do have a fax machine at work which sees daily use, although we have unaccountablyfailed to receive our K&W STD as yet.