I found this question recently which is truly a movie mistake question and it has got already 2 closevotes:
I have got a question and a suggestion regarding this issue.
Question: What does the tag plot-inconsistency serve for? I thought it points out movie mistakes.
Suggestion: I believe movie-mistake questions dont fit well to the Q&A format. It just gives rise to lengthy discussions. Movie mistake questions are not allowed here This should be added to the FAQ section explicitly so that new users can be led correctly.