There must be very few such cases. The point is that if a person has an habit of plagiarism and he got un-noticed, he or she will continue the plagiarism and will be caught eventually. Its hard to believe that anyone who do plagiarism initially one or twice, stopped doing it later. If he know that plagiarism is not allowed and will ban his account, why would he do in the first place. plagiarism is mostly done by those who are unable to write good posts themselves.
You hit the mark with your judgments. This is exactly what happens. This is human psychology. If a person has committed plagiarism once, then either he is not aware that plagiarism is not permissible, or he hopes to hide it and remain unnoticed.
This is exactly what happened two days ago. I saw that the senior member had committed
plagiarism. Then I went through his posts and found another 3. I didn’t look anymore, since this amount is quite enough to assure the moderators that plagiarism is not accidental.
His account was banned.
And what happens the next morning? The owner of the banned account raises his
second account and registers with the company in which he wrote his first account. Judging by his writing style, some points are very similar, so there is no doubt that the second account belongs to him as well.
I checked his posts too. And I was not even surprised, as there was a lot of plagiarism on the second account.
Therefore, it should not always be assumed that plagiarism is an accidental act, it is not at all the case.