Oh shit, I didn't reply because I thought you sent a PM to all mods. And I didn't answer because plagiarism is very very rare in the Fr section (and I'm very happy about that because it's very annoying). I won't comment because I don't know how other mods that deal with this kind of cases do.

What I can say is that there is no official policy change for plagiarism cases... because there are no official rules for plagiarism. It's case by case. Often I find reporters are very strict, you cross outside the crosswalk, you go to jail !! You have to judge on several factors : did it happen once ? Is it an honest omission ? Does he really take ownership of the copied text ? Etc...

Obviously Theymos knows about this case and nothing happened, you can move on. But naim027, you are on the radar of many people, never forget to add the source again