The more these questions get into legal areas the less I can help you. YC's lawyers are charming, but moderation of this site has pretty much failed if we have to resort to asking them things.
But let me take a crack at this. No, pasting the full text of an article directly into the thread is not a good workaround. First, it gums up the thread. Second, obvious copyright issues.
Therefore, if there's a standard workaround like "incognito window", "turn cookies off", or "google the article title", the way to help people is to teach them that. If none of those things work, linking to a different way to read the content (such as a Google cache link or an archive link) is probably ok. Beyond that my crystal ball gets cloudy.
