But if it happened repeatedly, 3, 5, 10 times or more, I prefer to ban him and never come back. There are a majority of us who do not cheat.
But it's not so much my view as Sir Theymos', I understand he doesn't tolerate plagiarism very much, although he lets the odd mild case pass.
It is true that if after the user is caught in a case of plagiarism and forgiven for this error, he repeats it again, then such should be banned, since they did not appreciate this second chance and continue to abuse the forum rules.