This has come up a couple of times in the last couple of days, so a quick comment on quoting articles, etc in comments:
Generally speaking, it’s not kosher to cut and paste an entire article from somewhere else and put it into your comment here, and also generally speaking, if you do it and I see it, I’ll probably excise the whole bit. That’s because it’s generally a copyright violation to post the whole of someone else’s work. So: if you’re tempted to just cut and paste a whole article from somewhere else, please don’t.
Instead, do this: Excerpt one to three paragraphs of the work (generally the opening three, but whatever’s directly pertinent is good), and then provide a link back to the whole article. That way, you’re probably not violating a copyright (three graphs of a longer piece pretty easily fits into fair use), and those folks who want to read the whole thing can do it. Everybody wins.
(If it’s a really short piece — a couple hundred words or less — just excerpt a couple lines.)
Likewise, if you’re quoting a poem or song, usually one stanza/verse and a link should do it.
Exceptions to this are if you know the work is public domain or licensed under Creative Commons, or if you’re engaging in a critical response to the piece (known in Internet circles as “fisking”). But when in doubt: Three graphs and a link. Thanks.