Mark Gravell recent activity has set a pretty strong precedent for an issue that the rest of us have been tip-toeing around: what to do with answers that are blanket copy-paste, without being properly formatted or cited to indicate where the answer came from?
We're still discussing cut-and-paste answers in general. That's tangential. This announcement is only in regards to posts which are plagiarized.
We have attempted to set a good example, editing these posts where we find them and hoping others would follow our lead. However, the problem is still rampant, so it is felt that a stricter hand is needed to keep the site on track.
From the currently top-rated answer on this post, Shog9 makes the following point (emphasis mine):
If you lack the expertise to answer a question on your own, leave the job to someone else. Plagiarized answers will be deleted without warning, potentially leaving a question unanswered.
As such, we propose formalizing this into site policy, as follows:
In terms of improperly-cited cut-paste answers, please note that going forward, these answers will be deleted without warning.
Some of you frequently indulge in this practice. So far, we've been polite enough to point it out and request you to update your answers, without much (perhaps only a DV in some cases). This has now changed. Please flag plagiarized answers so we can address them promptly.
Of course, you are welcome to edit the answer so it is properly cited. This is essentially what we want you to do.
Properly citing and formatting a quote must include, at minimum, a mention of where the text was copied from (regardless of it is from an online or an offline source), with large blocks of quoted text formatted in a distinct blockquote (i.e., Ctrl+Q in the editing window).
This will help the site overall with quality, and will also keep it from wandering into potentially dangerous legal grounds.
We'll leave this up for a few days (to be determined) to establish a clear consensus among the users of the site.