I think people are just lazy. They don't want to have to do any work to find the information they are looking for, they just want it handed to them on a silver platter.
They won't read the manual, google or try and do any kind of independent research to come to their own opinion. They want others to tell them what to do, what camera to buy, how to use it, etc. Kind of makes you wonder sometimes how the world continues to function.
As Slipe stated, I have been in forums that have been very heavily moderated. They really were not much fun. Here, the moderation is moderate and not too heavy handed. I think it is well done. You have the choice to ignore the silly posts and dumb questions. That's mostly what I try and do.