https://interpersonal.meta.stackexchange.com/q/3583 and https://rpg.meta.stackexchange.com/a/8697 are examples of other sites documenting their citation expectations? Do we want to do something similar (citing sources is after all, at the heart of what genealogists do!)
I would like to see more citations, and more background information generally, in many of the questions and answers here.
However, if we become too insistent upon citations I think we risk being offputting to those early in their journey to discover their genealogy and family history.
If we create such a Q&A then I think it should try to steer askers and answerers towards providing more citations, and be cautious about any insistence that they always provide them, which could suppress how many questions are asked here when we are far from reaching our target of 10 questions per day.
This Q&A may have some elements in common with an earlier one of Dealing with broad questions that ask for "any information about <person/family/etc>"?