i've seen few members doing plagiarism and i reported their post straight to the moderator.
the next day, their post is gone.
so i think making a list like in the op is unnecessary.
and about this, until this forum implements a specific rule for this kind of action, deleting their post is the best we can get.
If we can't ascertain rightly whether it is a bannable or deleting of the post. Plagiarism is generally considered as a criminal offense and one would be charged as that.
Even in project or thesis writing, referencing of a source, an author and quoting a lifted word or phrase is important. Thus, a stricter measure rather than mere deleting of a post should be appropriate.