why are people so careless when it comes to spoilers?

It honestly makes me so mad when people post spoiler pictures and/or info about future episodes! Like when những người hâm mộ are able to watch the hiển thị being filmed and they take pictures and record video and post them! Why are they allowed to do that?! Also why are they even allowed to watch the filming?! Does no one care about spoilers? I get so mad when someone posts an on set candid picture of a death scene hoặc a reunion scene hoặc a surprise discovery! No wonder the hiển thị has gotten predictable! Why do people do this and think of it as no big deal?!