OK, so instead of marking a wallpaper for deletion in order to report that it is in the wrong category, let's use this thread as a means to report those cases.
[color=#FFFF99]One simple rule:[/color] Enclose the Wallpaper ID in square brackets [ ] when reporting so the wallpaper thumb is visible, and mention what category you think they should be in.
Wallpaper ID is present in the link for the wallpaper.
In this case, 253702 is the wallpaper ID. Enclose that in square brackets and you get this: