A month or so ago, we had a question (credit to Kyle Kanos for the screenshot) stemming from legal interests. The question mostly follows the site's guidelines, and it doesn't seem promotional in content. But certain characteristics of the questions make it seem of an interest not those of "active researchers, academics and students of physics and astronomy" as specified in the site definition. The question was later closed as off-topic due to the same.
The question might have some educational value useful for the community, but making use of the sincere services of users who want to contribute to society, for something else is not fair.
I think these questions challenge the very definition of Physics and other sites. Therefore, should we modify the guidelines of the site to formally indicate utilisation of the site for such interests are not encouraged ?