Based on earlier discussions on defining shopping (in a specific case), I suggest that the Shopping needs to be expanded. At the moment, the Asking section suggests not asking shopping questions of certain types:
Suggestions or recommendations for a university, journal, or research topic (a "shopping question")
However, often there are questions doing the very same thing asking about existing research (i.e., not asking for a topic or venue, but the research itelf). This is same as asking others to do the work for you. For instance, I'd think that a good question, on the other hand, asks for a specific information. Questions that are explicitly about finding whether a prior research exists or not are shopping for ideas. So, a question that asks for providing evidence of prior research should be treated as shopping question. A hypothetical example would be:
Is there any research that have studied the the impact of such and such?
On the other hand, if the above does not fall under shopping, then, one can argue that asking for a research topic should also be removed from the criteria since both are asking (read: shopping) for guidance.