Ban, this is personal punishment. To buy an account and sell, is not prohibited by the rules. Even if a new script, could find plagiarism in old messages, you can not punish the not guilty. These are the rules.
Although the rules of this forum, they always work against users. I know by my example.

Good day! I made a mistake in writing the post on the English line, in reply to the guy on the situation with bitcoin, I pointed out the data from Coindesk resource, forgetting to leave a link to the original. In total I have written two messages in English for the entire time of their existence and found an error in them. from my 1200 posts, I always pointed out the resource, I did not steal any posts and did not spam. Yes you are right, I made a mistake, but who is not mistaken? Is it worth insulting a person with a ban if he was mistaken? I realized the lesson, and my posts can be checked and they speak for themselves, I pointed out the sources. Forgive me, no one is perfect, but I understood the lesson!
https://bitcointalk.org/index.php?topic=1926895.msg38383563#msg38383563