I wonder if there's a different attitude toward spoilers or "great works of art" in the Wizarding World because of memory charms. Hats which could charm endings or plots out of people's minds, people who would only read one book over and over again by repeatedly blasting it out of their heads, or museums/theme parks Obliviating any previous experience there so that every time is fresh.

Would also like to see Eliezer lampshade the Snape kills Dumbledore spoiler by having everyone present self obliviate or something similar.