I caught User:RRabbit42 editing on my report page, and has provided us with something that could help us against vandalism. He recommends that you and the other admins install QuickToolsv2. If you have any questions, ask RRabbit42.
User:Dl34 has been uploading gibberish named image files. I left him/her instructions to rename his/her files before uploading them and to categorise them, but does not appear to be paying attention what I've said.