I ban you because I still didn't call you ban, I called you "you." "Ban" being your status and you being "you." 
I am talking about the first fragment of the sentence, before the transition word "because."
You said "You are ban." "Ban" is a noun in that sentence, not a status, or adjective. The correct thing to say would be "You are banned."
I ban you for using nouns in your sentence.
