So, instead of controlling yourself, you expect millions of randoms on the internet to control themselves? Most spoiler people just get worked up about the idea of spoilers and not the spoilers themselves. Taking on the journey yourself is completely different than viewing bits and pieces out of context, those bits and pieces are more likely to enhance the experience than to completely ruin it. That is unless a person is so bent out of shape that they've been soiled they can't enjoy all the parts that lead up to and follow the event.

Tldr, spoiler people are drama queens