(Again, being a bit contrarian)
I have several different opinions on this - which are not all consistent with each other. I agree that it is annoying when people ask the same questions over and over (the 180th rendition of "Will it run Windows?" or "Does it work with a VGA monitor?" is definitely a source of mirth) - but, OTOH, I don't really think of it as a bad thing, more as a funny thing. So, if I put in a sarcastic response, it's not really that I think the poster was a bad person or even a stupid person, just an amusing person.
Second, it is true that even though the info is there (on this board), it isn't easy to get to. Now, for what it is worth, when I first came on this board, I read that the RPi had RCA and HDMI video outputs, and my first reaction was "Cool, HDMI!" and my second was "And, nice that if you don't have HDMI on your TV, you can use the RCA outputs. Nice". And then sometime after that, I figured "Hmmm. So, it won't work with VGA.", but this didn't seem that big of a deal, since it seemed clear to me that this was a device built to work with a TV, not with an old-fashioned computer monitor. It didn't seem like that big of a deal. But it seemed obvious to me that if it said it did HDMI and RCA, then it probably did that and nothing else.
Yet, for all that, what wasn't clear to me was the schedule - the all important questions: When can I get one and what will it cost? So, I did some FAQ reading (back in January) and the results were inconclusive, so I posted a thread asking the questions. The responses were courteous, so there was no problem, but it has occurred to me since then that someone might have sarcastically posted that all the information is here in the forum and if I'd read every single forum post from beginning to end, I'd have gotten my answer without bothering people with yet another post (on this, in some people's eyes, "contentious" issue).
Another one, consider all the forum threads about QEMU and emulation. At this point, there are about 6 long threads on the subject, and I think it has been talked to death - all the info one could need is there, somewhere, among the threads. But you know perfectly well that the next person who comes along is going to start a new thread rather than read all 6 of those from beginning to end. In fact I know pretty much what all is there, and do occasionally have to search it (to get the syntax, e.g., for the various QEMU network-related command line options), but the search is difficult and obtuse and time-consuming. The person who doesn't know what is there is not going to bother.
So, what does it all mean? It means that forum software is not an ideal medium for storing this kind of information. Wiki is better, though not perfect. I have to admit that I've never accessed the Wiki here (I've heard that it exists, but that's about it). Now, you can say that this is a failing on my part (What??? You haven't read it [the wiki] from beginning to end??? Who do you think you are?), but the fact is that if I haven't read it, nor will most people who've found their way here.
I just don't think it is reasonable to expect people to have read everything, but that doesn't mean we should stop ribbing them into doing so. And, I don't have a problem with being a little sarcastic about it - it makes things more fun and interesting.
Finally, a quote. Someone posted the old chestnut that "My grandmother always said that if you don't have anything nice to say, say nothing at all." to which my response is that Dorothy Parker (love her!) said "If you don't have anything nice to say, come over and sit with me." (I think that's the quote, corrections welcomed!)
And some folks need to stop being fanboys and see the forest behind the trees.
(One of the best lines I've seen on this board lately)