For some, spoilers really do spoil
The results suggest that obsessive avoidance of anything with the potential to reveal a plot twist is probably unwarranted. You'll probably enjoy the movie, book, or TV show either way.
But what if you're convinced you've been exposed to a spoiler before and it really did ruin your reading or viewing experience?
It's important to remember that Leavitt and Christenfeld's results are average results. They don't mean that everyone will enjoy a story more after it's been spoiled. Indeed, a recent study by Judith Rosenbaum and Benjamin Johnson supports the idea that how you respond to spoilers might depend on your personality.
The researchers focused on two personality traits: "need for cognition" and "need for affect." People high in need for cognition like to think and tend to seek out cognitively demanding activities like crossword puzzles. Analogously, people high in need for affect like to feel and tend to seek out emotional activities like watching heartwarming videos on YouTube. Although these two personality traits seem like opposites, they are independent -- it's possible for someone to be high in one, both, or neither. In a study of 368 undergraduate students, the researchers found that students high in need for affect did, on average, tend to enjoy unspoiled stories more than spoiled stories. This could be because people that enjoy emotional experiences benefit more from the uncertainty and anticipation of not knowing what will happen.