The people who say that have no self control and don't want to feel guilty over spoiling things.

Sonic the Hedgehog 2 comes out in theaters and my discord friend is going to see it. I ask them, plead with them, to not spoil anything. "Seriously, don't. I can't see the movie right now like you." What do they do after they've seen it? Jump right into an ongoing voice call and begin talking about all the spoilers.

Later I was told I should've just avoided them because it's not their fault they got excited and wanted to talk about it. You cannot win with these people.