"Of course, there's an aspect to our situation that did not apply to either the Weir or Clarke cases. Those novels were finished before they were optioned, adapted, and filmed. The case of GAME OF THRONES and A SONG OF ICE AND FIRE is perhaps unique. I can't think of any other instance where the movie or TV show came out as the source material was still being written. So when you ask me, "will the show spoil the books," all I can do is say, "yes and no," and mumble once again about the butterfly effect. Those pretty little butterflies have grown into mighty dragons. Some of the 'spoilers' you may encounter in season six may not be spoilers at all... because the show and the books have diverged, and will continue to do so."
lol this happens all the time. the result is that the people who write the source material don't divulge the entire uncompleted story to the people making the show, and in response the people making the show usually take a hiatus.
i have no pity for GRRM. he started out writing for television. he knows how this works. for him to be so naive walking into HBO studios is just ridiculous.