This is becoming a very interesting thread indeed. How can you block the bots? I never heard of that. The truth is that I saw two days ago a page that was number one for a keyword I am trying to rank for. The strange thing was that the other competitors have a lot of backlinks or backlinks coming from websites with PR 7, 8 and even 9, whereas that page had only 3 backlinks.
So maybe the same technique, redirecting or hiding, is used. If someone can give a senior opinion, that would be a great knowledge for us all.