I had decided to ask a simple question to be sure if The Killer Inside: The Ruth Finley Story was about that woman that had harassed herself in the late 1970s.

Someone then chose to respond to me "crying SPOILER" with a sarcastic thanks.

This was my response. I felt as if the sternness and tough love was necessary.

Complaining about spoilers regarding a movie based on a true story is ridiculous because it's based on something that has happened that any one person can easily read up about. 

Another point, I was asking a basic question. A basic question is not a spoiler. A question about a movie's plot, to see if it's the right movie, is not a spoiler.