A) We make a thread dedicated solely to plagiarism and have it as a sticky in the Help, Off topic and especially Bounty section. At the moment there is no such sticky thread. Doing my search I found this thread >
https://bitcointalk.org/index.php?topic=5037514.0 B) After a user registers on the forum he should be redirected to the above thread. The thread will explain in layman terms what copy/pasting is, why it should not be done and that posting plagiarised content here
WILL result in a permanent ban. There will also be examples of posts that got other users banned and examples of proper quoting and citation.
You can't force a user to read anything. In fact, trying to push a user to read something (such as in example B) usually leads to exactly the opposite. Most users will strongly oppose reading it.