I think it creates a weirdness to the site to over-"police" these kinds of questions, because it feels like these are exactly the kinds of questions that would be of closest equivalence to the general kinds of questions in other StackExchange topics like StackOverflow.
StackOverflow questions, no matter how simple or "dumb" or "badly worded", can be immeasurably helpful and useful because they show-up in Google searches and general site searches, even with just a few overlapping keywords, not to mention the benefits of having a plethora of "related question" links off to the righthand side of the page.
If I wanna know how to automatically make timestamps appear with 3 letter weekday names in Python, that's not really a question that any tutorial or book or general Python website would explicitly cover. But it's exactly the kind of question that you find on StackOverflow; often multiple times.
Sometimes the accepted answer is a link to the documentation, or sometimes there's an answer with a bunch of examples and even some other libraries/packages that you never would have learned about otherwise. That's the huge benefit: discovery.
Sure, having all questions be "Help! What's this movie's name?!" is difficult to track and overly generic. It's a bad title. But it's not necessarily a bad question; so why downvote it?
It seems like it'd be relatively easy to see the question, open it, rename the title to "Identify this: ________ [?]" and fill in the blank with a few keywords from the first line of the user's question. Make a comment that you modified the title. Then, go into the question and help the user out by appending their question with a quick block of markdown:
**Time Period**: 1970s ???
**Where Seen?**: Theatre
which will appear like:
Time Period: 1970s ???
Where Seen?: Theatre
And then add another comment saying something like "I added a quick summary section for you, please fill it out if you can think of anything more, so people can help answer the question.".
That way people will be encouraged to participate if the "hard part" is already done for them -- and sticklers will get the satisfaction that the site is more coherent and cohesive.
And lastly, I think people should be careful about "correcting" other people's writing. If someone doesn't write syntactically or grammatically "King's English", it could come-off as very discouraging when they return to their question and notice that it's rewritten for them.
If something is unintelligible, then it seems like it would be more appropriate and supportive/encouraging to make a comment like "Can you try and explain more? I didn't really understand when you said '_____' ...? No worries about the grammar, just any more details you can provide would help!". Especially if you want someone to clarify what they've already said; if they get approached with this "policing" of their language, why would they try and say more? Have you ever had anyone interrupt you while you're speaking and "correct" your syntax or grammar? It becomes very frustrating, and you can get the sense that if everything you're saying is coming out "wrong", then why say anything at all? It's disheartening, and I don't think that's the "vibe" the site would want to espouse.
Sure, go ahead and "police" for duplicates or things that are racist, sexist, or "off-topic" -- but what's that whole den of snakes when you're in a site just called "Movies & TV"??? -- just like StackOverflow, but I think it's important to remember that the benefit should be to provide a way to find questions, ask questions, and answer questions. Doing things that would actively discourage any of that, doesn't really seem fruitful. No matter how syntactically "clean and tidy" the question queue becomes.
Where else can you search for questions like "this movie or show where like there's a creaky noise and maybe a swingset or a swamp and a craggly demon mask guy is in a movie theatre???" and get someone who just so happens to stumble across that rambling stream-of-consciousness and go "Oh! That's definitely Donnie Darko." and give you a screenshot of exactly what you're trying to remember!? A site that provides that; that's magic.
And that's probably why we'd wanna be here and contribute and participate.