@Mame,
Yes, that's true. But what you are referring to is a sensible use of the quote function, wouldn't you say? Not the "quote everything every time" approach.
Many people also use that trick of quoting specific phrases or even parts of sentences to twist the meaning of others' words, by quoting fragments, making it look like they are saying something entirely different from what they actually are saying.
Never seen you do it, just to be clear that I'm not trying to get at you. But it is being done