It sounds absolutely fascinating! Reading those comments on the Portuguese blog, it doesn't sound to me like some Christian crusade (surely that would be rather more obvious), but like a very elaborate and well-done wind-up. It would be such fun to do! Create a work, litter it with clues and puzzles and red herrings, mail it out to people whom you know are intelligent, computer-literate and probably drawn to puzzles and intellectual exercises, then sit back and monitor the internet, to watch the result.