- It is not necessarily cheating to ask PSQs, and even if it were, policing such things is not our job.
It is not my duty as a civilian to enforce the law. That is for police officers. But if I see someone robbing a liquor store drop his cell-phone, I'm not going to say, "excuse me, sir, you dropped this!"
That is to say that while I have no obligation to prevent the possible crime in progress, I'm not going to pretend that there's a good chance that what I'm witnessing is in fact a crime. I'm going to call the cops. And if it turns out to not be a crime, but just a low-budget film being shot without a permit, then the police have the discretion to deal with it as appropriate. There's really no detriment to calling the police. If it's all an honest mistake, it will be handled the right way. If it was a crime and I do nothing, then criminals go free.
PSQs may not be cheating, but when a question is nothing but a PSQ it looks a whole heck of a lot like it. At best, the OP is using Math.SE as a factory. At worst, they are cheating. By closing the question and leaving a comment, we take the prudent action, and give the OP a chance to say "oops, sorry, I was filming a low-budget movie."
- Many students, especially non-majors, are truly lost in the face of some exercises, and don't know how to describe where they're struggling.
If a student is struggling and doesn't know where to start, it is not hard to say, "I'm struggling and don't know where to start. Please give me guidance on how to begin."
If they don't know to say that, then the problem they're really having is much deeper: they don't know how to properly ask questions. In such a case, we do that student a much greater pedagogical service by teaching them how to ask questions in such a way that they receive the best benefit than we do by giving them the answer to that one specific question. Teach a man to fish, etc.