Furrin_Gok said:
There are way too many things that need to be deleted to explain each and every one personally.

It's not like this would be a regular occurance. If the e621 administration panel has some kind of "user notes" section (like the records tool, but for internal usage only), then admins could leave a note for the other admins saying that this user had already had the upload guidelines explained to them. They could also leave a note telling other admins not do it again unless under special circumstances.