Regarding the warning you gaveEdit

Hello. The warning you gave on [[:{{{1}}}]] was unnecessary as this editor is {{{2}}}banned. Please do not warn banned editors in future, as they can be blocked on sight. Thanks, ~~

How to useEdit

Add {{subst:User:Ferien/Warnings/Banned|1=User talk:X|WMF-}}

1= where the editor added the warning (e.g. if it was on User talk:X, add User talk:X)

2= how the editor is banned (e.g. WMF-, community-, or globally )

You don't have to add a heading or a signature, these are added automatically.