Spoilers don’t really spoil things. If some piece of media (book, tv show, movie) is good enough, knowing what happens later won’t actually spoil it. People are way too touchy about spoilers.
I don’t go out of my way to spoil things because I’m not the kind of person who likes to piss people off just for fun, but honestly, my Dad once fucking ranted at me because he thought I was about to spoil something in Breaking Bad.
I had all of Fullmetal Alchemist: Brotherhood spoiled for me because I browsed the fma wiki, but it still ripped my heart to shreds.