I'm glad you brought this up. I've been advocating this for years, not just the old "medical questions may be asked, however..." response but also for the scams ("earn $68 an hour from home..."), trolls, kids on Mom's computer, surveys, etc. I'd like to see helpful stuff to new people, like "put your location in the title" (like people looking for doctors or daycare in East Overshoe and you don't even see that until the third paragraph. Help writing the titles vs. the details would be great. So many posters start their life story in the title and it's impossible to choose by our areas of interest unless we read deep into the post. A standard response could be prepared by the moderators so they don't have to individually answer each one, and could include 2 examples of "ineffective" questions (better than "poor" questions) and their re-written improvements which will be better for the poster as well as the responders.
I've long advocated that EVERY first question (new members, at least, or first posts unless they've been a member for 6 months and have seen how things work) should go to moderators first, with an auto-notification that your first question won't be published until it's been reviewed for content and compliance. I'm a member of Freecycle, and a new member can't even post that they have a bicycle to give away until it's been reviewed.
It shouldn't be hard. But then again, there have long been tech issues on this site that baffle me.
I think the pointless questions, and the inevitable backlash by members, contributes to this site not looking useful or hospitable to new members, which contributes to our decreasing numbers and questions. Fixing this would be a win-win-win (for questioners, for responders, and for advertisers).