I would like to offer a different point of view. I come to this site from a different place than many of the participants, because I am more of an information-nerd than a movie or TV buff. I am also an artist, and one thing I have come to appreciate as an artist is that when I want to do something as simple as make a drawing, I have at least a dozen decisions to make before I ever put down my first mark - (paper or board, small or large, color or bw, loose or tight, messy charcoal or tidy pencil, realistic or abstract, wet or dry...). All of these decisions affect the end product and the viewer's reception of the final piece. Multiply this by thousands if you are trying to make a movie.
What is sometimes discounted as trivia on this site really is important to the way other people appreciate a movie. Choosing to do the stunt with the hose was a decision of the writer or the director. It tells us about his intentions - Does he want me to believe this? As an artist, is effect more important to him than truth? And at the end of the day, the situation he presented in his film stretched my understanding of the world because I researched fire hoses, and the next time I see a fire hose in a film, I will be fractionally smarter about what I am seeing.
There was another question, recently closed, about the music used in an episode of Louie. It was a fascinating choice of music - when I searched for the identity of it I discovered dozens of bloggers wondering about this piece of music. It affected people. I went and watched the episode after I found out that Louie has all of the music written specifically for his show by one band. Music is integral to movies, television and perception, and to my mind, a decision no less trivial than location or CGI decisions or changing the ending from the book.
The other argument I would like to make for not closing questions that seem trivial is that we are turning people away from the site. The man who asked the question about the Louie music will certainly never be back. We need more people and their diverse interests. I think we should embrace the trivial because at the end of the day, one could argue that everything discussed on this site is trivial in varying degrees.
Stepping off of my librarian soapbox. (smile)