User "muybwrpv" has been deleted from Migipedia was replied to my mail.
I had quarantined the posts for the products.
You can mark a post as unwanted by clicking on the triangle, which then turns red. If two different users click on the triangle, the post disappears, but you can reactivate it in Migipedia or delete it permanently. Unfortunately, it remains in the activity log until Migipedia intervenes!
@Frederica Thank you also for the explanation. Yesterday evening when I was logged in I could have clicked on this sign over 200 times (that's how many ones he made) ;-) but since I haven't been here long, I just didn't know what to do.
But now I know for the next time.
It's great that Migipedia reacts so quickly and deletes something like that. It's also annoying.