Even though I may think everyone has seen the movie Psycho, or must at least know about it, I would not, for the life of me, give away the ending. Same goes for The 6th Sense or any other movies or books with great plot twists. And even though we know that romance books inherently end with a “happily ever after” I wouldn’t tell someone HOW the couple got together.
All of those things are “Spoilers”, they spoil the experience for someone else. That person won’t get the opportunity to have a first-hand experience of the story, the way the author meant for it to happen, if someone gives part of that story away. It takes from the reader (or movie watcher), it takes from the storyteller and it takes from the story experience.
I understand people like to share their experience of a story and it’s so fun to do so. My online community has a place for each series, then each book, and people go there to discuss the books and characters. But, we always ask people to be certain they write “SPOILERS” if they are going to give anything away.
Reviews should also say if there’s a spoiler in them. It’s common courtesy. I do see reviews that warn people of spoilers and I really appreciate that.
Spoilers are just that, they spoil the experience. Maybe there needs to be a place specific for readers who have already read the book, like an online book club? Does anyone here know of a site that is only for book discussions AFTER the book has been read?