I don't think these should be allowed, or possibly just downvoted. Getting information from the forums is fine, but copy+pasting (especially without bothering to format) is bad. What often happens is that a series of posts are copied, which is not a good format for answers. Answers should get straight to the point rather than being a conversation.
Bobjoe520 said: Why do we do the thing with the stuff?
JoeBob said: because it's better that way.
Bobjoe530 said: but why is it better?
BobExpert said: It's better because the foo of the bar and complicated explanation.
It's better because the foo of the bar and complicated explanation
The reason why the foo of the bar is because the bar of the foo is barry of the fooing <complicated explanation>
More info here: http://example.com/forumpost
The key point I'm trying to make for "better" is to read and then re-word the post to answer the question in stackexchange style and to directly answer the question.