Agreed. I don't know what "PROGGY" is, but I find it strange that I didn't hear of this on the news or somewhere.
However, they have some interesting pictures, and if they did make up the code solution the language they chose to do so is pretty interesting. I posted another topic asking the head of the site about this, but no response yet.
I agree if I wanted to have all athe time without any pressure from the outside world I would put out a story of descovery to ward of others. Also the so called X marks the spot on the rock seems a little odd that nothing was ever mentioned of it in the letters.