Good you brought this up. Yesterday I cautioned an OP for what I thought was plagiarism from a web article. Turns out he was the original author but was new here and had not made any reference to this fact, or the article on another website. The bots missed him but I noticed and cautioned the author, but I did NOT flag him. Maybe bots should first caution and then start flagging down repeat offenders. The post I commented on is here.