I feel what Korman feels. As a teacher myself, I don't just answer questions, I train my students how to ask a question that will be more helpful to both parties. I tend to treat kind and prepared help seekers better than those unprepared or unwilling to invest the least amount of time to ask a question.
I might be unfriendly sometimes to somebody but I think creating an environment where everyone knows how to properly ask for help is just as important as creating an environment where everyone is ready to help others. Allowing too many crappy requests discourages helpers.