For what it's worth, I think one reason that it's hard to reply to a poster on an Internet forum is you just don't know their backgroud/situation. I could ask a mate on site a relatively "simple" question, something I've forgotten or just don't know, he's happy to tell me the solution because he knows I'm not about to do anything stupid or dangerous, and yes I could go look it up, but being told is just as valid. I'm unlikely to ask those questions here because I know the likely response!! I'm sure there is also an element of one-up-manship in certain replies....!
That being said, it is always an enjoyable and often very informative read.