Just taking out of context, with no intent or attempt to make the quoted hold a position other than the one they actually do is not the issue and is not quote mining ... it is quoting, and is properly done all the time, albeit often as part of a misplaced argument from authority.
Here is what DW posted:
I don't see what you cited as a form of lying anymore than taking a teeny tiny snippet from Dostoyevsky's "Notes From The Underground" and using that as a side swipe regarding facts vs. opinions. But I'm thinking your opinion on all this will outweigh any facts I may wish to allude to in the point I am making. So, if you feel self justified in attacking the poster with various "you" statements rather than the ideas, so be it. I just enjoy calling that stuff out.