One issue that has often puzzled me is when users get irked when someone asks an innocent question, often hostile responses result, RTFM., have you not read the FAQs, have you Googled it. Can you imagine being in a synchronous scenario as @petermarkley describes, say a pub, and you ask a mate, who happens to be a mechanic, about an issue with your car. He's not going to fire back at you and order you to RTFM or read FAQs before bothering him. It is the anonymity of being hidden from view that makes people respond in ways they would not generally do so face to face.
Interesting point and a bit of a grey area really as there's valid arguments both for and against these sorts of testy, unhelpful replies.
The difference is that on an internet forum, a member has the power of the internet at their fingertips, so it may be reasonable to expect them to Google the issue first, search the forum, FAQs etc, ie make
some effort to resolve the problem or get more info before asking a question. It can be seen as disrespectful to the community to not do that first, too. On the other hand, that person may be totally clueless about the subject and feel totally lost so doesn't even know where to start, in which case it's reasonable to just ask the question, but read on.
Both scenarios are valid and also most of the time, people are all strangers to each other, so it's best to give some context when asking a question, or the default expectation may well reasonably be for members to be expected to do some homework first, especially if it's a common question.
Being open and honest is important here, therefore, what I do if I have to ask a question is to state that I've done the homework, perhaps going into a little detail and then explain that I still don't know the answer, or have only a rudimentary knowledge of it that's still not enough to solve the problem, hence asking for help. If I have no idea what to do to even start to approach how to solve the problem, then I state that too. I would then not expect other members to give me that testy response if they're reasonable people and to actually help me out.
When the situation is face to face in a social scenario like the pub, it is indeed different as it's
realtime offline interaction. The conversation may turn towards a subject which the member may need help with, so it would be reasonable to ask. Imagine one member has a car fault problem and there's a mechanic in the group, then it's perfectly reasonable to ask them for some help and advice about it and expect a helpful answer, even if it only results in info for which direction to go in to solve the problem, perhaps.