Due to the nature of WorldBuilding, the details of a specific world are changeable and therefore subject to discussion and improvement. This can lead to debates on whether a certain technology is effective or not in this world or whether this world should utilise a certain feature.
In some cases this is great because the owner of the world is open to new suggestions and revising their world or adding to it. They don't mind whether answers provide a solution to their problem or adjust the details of the world to remove the problem.
In other cases, the owner is set on their world and does not want the details to be discussed; they just want an answer based on a scenario that they have already finalised. In this case they purely want a solution and do not want alternate suggestions.
Would it be useful to have tags to identify how flexible a user's post is?
Of course, it is completely possible that the OP could simply put in the question whether it is open for scrutiny, however I think that tags would be simpler and more widely used.