I completely disagree with the proposition that we should refrain from answering questions in order to educate new users. I simply don't think it's my job to educate new users about how to ask questions. And I don't really agree with the idea that withholding useful information is a good way of educating people.
Like all of us, I don't theoretically like (what seem to me) to be lazy questions of the "do this for me" type, and I'd sooner ignore them unless they happen to pique my interest.
But there are lots of reasons for "bad questions" including lack of familiarity with the very weird and complex LaTeX ecosystem, and quite often language issues as well. When you know how to do something difficult (whether that is driving a car, playing a musical instrument, solving an equation, writing LISP or LaTeX or finding answers on TeX.sx) it's very easy to forget how difficult it is to learn and attribute bad faith where there is none. LaTeX is a vast (over-)complicated "system" built in a ramshackle way (I can install Ubuntu faster than TeXlive, or at least not much slower!). It's idiosyncratic to an almost absurd degree. Its documentation is both wonderful and, often, more or less useless to anyone who actually needs it.
So I like to be slow to assume bad faith. And we should bear in mind that the primary "educational" role this site can serve is to teach people about TeX and not to teach people how to ask questions on TeX.sx. I'd really rather put up with a few annoying jerks than put off sensitive potential users with real needs. An inexperienced person who is browsing and considering whether to ask a question will very likely not understand why what looks (to them) like a reasonable request is being treated with disdain: they may well just see the disdain.
If we behave like oracles, who will only speak when the supplicant has duly performed arcane rites to perfection---the archive meticulously searched, the MWE melodiously intoned, the log-file scrupulously offered---we will find ourselves sitting in an empty temple before a cold altar, while doctoral students write their theses in Word.
So, all that being said, nobody is obliged to answer, and if you think "I can't be bothered to answer" don't. But there's no need to say that this is done out of the high purpose of educating anyone; it's quite alright just to say "I can't be bothered answering if someone can't be bothered to ask a question to a certain standard". That's up to you. And if other people can be bothered answering, that's OK too.
For myself, I will answer any question if, however badly it seems to be written, I am reasonably confident that I know what the answer is, and have the time to spend to answer it. I'm not going to answer if I am completely in the dark about what the questioner wants, because I may be wasting everyone's time. And I may not answer if the questioner is so confused that it's going to take endless backwards-and-forwards with comments to set things straight, when the problem is simple and dull. But otherwise: sure, I'll answer, because I think it is more conducive to the lively and widespread use of TeX (which I care about) if people with urgent and immediate problems get them solved than if we build up (yet another!) comprehensive and intractable pool of wisdom, or a set of fossilised formal conventions.