[Tinordi]

If you were so concerned about spoilers why wouldn't you just read the books?

That's not absolving the jerks that spoil things but really the power to avoid spoilers is mostly in your own hands. You can either a) read the books, or b) not read or discuss Game of Thrones on the internet. Otherwise you're opening yourself up to the risk that you'll encounter a jerk, which on the internet, is a virtual certainty.