You should quote only what you directly responding to. A good example is answering someone’s question and you quote the question before you type in your answer. Keeping your quotes short is very helpful in lowering the amount for the reader.
Also keep in mind responding to someone’s ‘none question’ is bordering on flaming or a flame war against the author of the original message. So be careful of what you’re typing. If you’re correcting the person because your knowledge base says differently, you’re bordering on a personal opinion, which is dangerous territory.
FAQ answers attributed to Raymond E. Feist are copyright by Raymond E. Feist.
It should also be born in mind that the answer given was only applicable on the date written, and to a specific question. You may find further, similar questions, in the FAQ.