Why should viewers be chastised for speaking publicly about a show they just watched?

Spoilers! I’m not talking about those who walk out of a theater and ruin the movie for the next viewers. I’m speaking about those who have discussions on social media after watching a new release of a show or movie.

Why should we be quiet if you haven’t seen it yet? Why not stay off social media until you’ve watched what others have already seen? Why can’t we discuss what we just watched? Why is it our responsibility to worry about you?

Thoughts?

I thought this topic was interesting. It’s something I heard today.