Why are people so terrible about spoilers?

1) If you have giant ass spoilers about something, PUT THEM BEHIND A GOD DAMN CUT.

2) When you reblog something from me, I can see what you write, so hey, HOW ABOUT YOU NOT WRITE ABOUT SPOILERS? Use your own picture. Luckily I already knew what was going on this time, but in the future I might not, SO STOP IT.

3) Urgh.