@ChrisS, there can certainly be questioners who ask hard questions, which will rarely garner lots of answers (let alone acceptable ones). Punish them for that? This site is for questions and answers, if the question is interesting, and you believe you can give a good answer, please do go ahead. If the asker is ungrateful, its their own loss.

Great. So don't use NAA if the answer doesn't answer the question (?!)

The problem here is that you educate one user, meanwhile 10 new clueless users are forming in line.