I think its impossible to have a spoiler free forum in here, thats because of all the action, difficulties and changes for the TV-Show. How should you been able to discuss about it? Most people read the books. Its simply almost every post in here includes spoilers, by arguing their expectation of plots/characters development. If you want to stay away from spoilers don't look into the forums, especially in here. Because this site was made for the bookreaders. Maybe there is a forum from HBO just for Show watchers. But even than you know how it is now a days. Doesn't matter where you are, there is always risk of getting spoiled. (Facebook, Youtube, Forums etc.) Best way is really to ignore it. Same as for me as i have just started with aDwD and there for i am very careful where i read. I could have finished the book, but i need a way to survive the time after we now finished season 3. And there is nothing better than read a good book during the summer. It became like a ritual to me.