Being fairly new here myself, I've observed the same not-so-gentle responses to some SoPWs (and, being of a fairly timorous nature, made sure to read every darn page I could find on the subject of posting before doing so). But I have also been impressed by the patient, tolerant and helpful replies that have been offered to even the most poorly framed questions. I think that's a testament to the quality of people there are in this place.
There are already the "please read this first" notes under the Add your question area of the SoPW page. I suspect the world is made up of those who read things first and those who don't, so
I don't honestly expect that another admonition on the Monastery Gates page would make much difference to the actions of the latter group.
The fact that unformatted questions still get through despite having to go through a preview stage suggests to me that the authors are operating in a write-only mode anyway.