My approach is to actively close the question as "Unclear what you're asking" so they can't get any answers unless they fix their question. Unless it's a moderator, the question cannot be re-opened unless there is an edit made to it.
Some people see this as being overly assertive. I admit it has made me a little trigger happy on some sorts of questions. ...
I believe that would be considered off-topic. Check out this explanation of what is on-topic here.
I suspect that such a question is probably off-topic for most Stack Exchange sites.
My only suggestion would be to use chat, which you already know about.
Provided the information could be posed in a Q&A style format, I think this is OK. It's perfectly OK to answer your own questions, so this might be one case where this is a good idea.
I know I asked a couple of questions that I intended to answer myself to get things moving on this site... but I received too many good answers --- probably better than ...
The rules appear to allow such questions if you state them the right way. Quoting Signal Processing Stack Exchange help center:
Some subjective questions are allowed, but “subjective” does not mean
“anything goes”. All subjective questions are expected to be
constructive. What does that mean? Constructive subjective questions:
inspire answers ...