In my opinion this is all related to the intention of the poster. We should not decide for them. I generally prefer not giving the whole answer to them but i know one very active community member who likes to give full answers to everybody.
I try to prevent myself to add extra rules. In my opinion, for this case, we can give
advices to the students (e.g. with a new forum rule). This is my thought.
Also: I saw people on Sun's forums who has thousands of posts and behave like he is god there and also behave crudely. We should learn to be open for different views even in a forum. Experience is good but it is just the result of being a couple of years older most of the time or being at the correct place at the correct time.