I feel your pain, and I'm also reluctant to spill out a ten-paragraph lecture in response to an incoherent single line question (although I often find myself doing just that). However, I think, at the end of the day, it's a matter of "the customer is always right", and the people asking the questions are, in this context, the customers. I've been in customer service my whole life, and one thing I've learned is that you can dictate terms to the customer, but the customer always has the right to walk away, so being too demanding can often be self-defeating.
It may be possible for iFixit to alleviate the situation by compelling the questioners to more specifically define the problem, or give specific symptoms of the problem (and not let them click "submit" until there is something in the field). I also agree with Machead3 that a FAQ, or some easy way for us to point questioners to a definitive answer to commonly-asked questions would be very useful. That way we can give a personal touch by stating, "Hi there questioner! Thanks for the question, and here's a link to what is probably the answer." So that way we're both personal, and yet saving time by not having to rehash something we've written a hundred times. I have to admit, I pretty much ignore "my backlight is out and I see a faint image" questions, because I just don't want to write the answer for that one again -- it gets to a point where it's just not fun anymore. If you pay me to do it, that's one thing, but if it's on my own time, I'm going to pick and choose the questions I feel like bothering with.
