I feel like there is a handful of users who stop by the site thinking "let's see, what can I close today?" or "Hmm... what looks particularly close-able?"
I am sure that's not the case, or at least that it's not so black-and-white, but still, for many questions by new users, if it is worded in a slightly non-standard way, or could be adjusted slightly to be better, there seems to always be one, or two close votes within hours, and these almost always appear without any kind of a helpful comment or explanation.
This makes the site less welcoming, and being welcoming is really important and part of our new SOP:
What makes this even more unwelcoming is that the silent close votes (those without any helpful comment) are invisible to low-rep users.
In SO or a few of the very high question-rate sites, the old "close early, close often" thinking was a way to keep heads above water. Here with what varies between 5 and 10 questions a day (it's picked up over the last several years, but I think it's roughly 4,000 questions in the last 1,000 days) this kind of quick, silent close voting is just not warranted.
I think there are at least two better and more welcoming approaches:
One or two users leave helpful comments, then we just let the question sit for a day to make sure the user has had a chance to see the comments and make a change to the question.
One or two users make a helpful edit to the question along with a helpful comment explaining why, and then see how things go.
I've been doing both of these for a while now and the results are quite good. Most of the time I get a "thanks" message, everything is fine, and the OP learned something through positive reinforcement.
On the other hand, closing the question makes a big mess, renders the question unavailable for answering, and requires more work to re-open it. To me that unpleasant experience seems punitive to new users, and profoundly unwelcoming.
Can something be done to encourage the silent insta-close voters to consider just leaving the question alone for a while, especially in the situation where the OP doesn't have enough reputation to even know that close-voting is in progress?
I don't know how to search for many examples, the most recent is Mass manufacturing of satellites which can probably be improved without the close/open cycle, and Game for teaching basics of orbital mechanics which had at least two close votes when I left my comment, and has since collected ten answers 41 up votes and 13 favorites.