First off, I have absolutely no idea of how difficult it is to change the wording of the question box on PhysicsSE.
My question, as in the title, (and as a newbie) is to seek other (more experienced) opinions on trying to balance two possibly opposing aspects of the site:
If the OP was asked to provide an indication of their knowledge/study background:
The answers would be more appropriate to the background of the OP and this may save a lot of time and effort in the use of the comments section, trying to establish information that the OP could easily provide.
Against this idea, is that, to me, the value of this website is the range of answers provided for each question.
So for other users with more background and / or experience, they may gain a lot from looking through the differing level of answers and I do appreciate that this element of the website is crucial, so I would guess that anything that potentially limits this aspect of PhysicsSE is not a good idea.