For an author of a novel buillt on the foundation of incredible surprises this is a weird thing to think. I just imagined him writing the Ned Stark death scene, the Red Wedding, the Purple Wedding etc thinking, "Man my readers are going to be so fucking surprised when they tear into this.". And it was true. I still remember lazily reading through the generally boring red wedding's description of food and festivities until I saw the word crossbow, bolt, Roose, betrayal, Lannister etc and had to reread the previous paragraphs a few times to tell what was going on.George R.R. Martin doesnt know why you care so much about spoilers | The Verge
Book Spoilers don't matter anymore!
I know personally when I know a character is going to die in the middle of a fictional work it's harder for me to enjoy their story.