Ooh, I must contradict your view on this quite a bit.
Although some answers to questions might be somewhat obvious, it is simply rude not to settle their curiousity. Perhaps annoying at times, it may be; but otherwise, it's somewhat impolite to view it on such an angle.
Perhaps there are different colours of dingoes; and perhaps you might've looked like one. Either way it would simply be polite to answer either 'yes' or 'no' without logging out because you thought their question was stupid. Maybe they were looking for someone to roleplay with that's the same species? I see no harm in that, nevertheless why it may be viewed as annoying.
One should not be expected to know everything, especially if they are new to the game and still getting a grasp on how the community works. I don't see how explaining something or advising someone or simply telling someone something might be seen as an annoyance to do; it's just nice, and that's all there is to it.
Let's take this for example-
My friend is watching Doctor Who. I did not know they liked Doctor Who. So I go up to them and say "Do you like Doctor Who?" and they do either
this: "Yea! I love Doctor Who!"
or that: "Ugh, of course I like Doctor Who. Why else would I be watching it?"
Is them telling me that they like Doctor Who really an annoyance? Is telling someone that you are one thing or another really that exhausting and constant? All-in-all, questions need answers. Not exasperated sighing and complaints about the fact they don't know something, or simply aren't sure.