The Superfluous "At"

Please understand that I am the son of a high school English teacher. I am also overly logical when it comes to language. [If I were to design a language, and I have been tempted many times (geek that I am), it would be so orderly and regular as to be positively boring.] So if what I am about to say is grammatically anal-retentive, at least you know why.

"Where're you at?" is an awful, ugly expression. Ignoring the poor use of a contraction (often dropped to the even worse "Where you at?"), the thing that really gets under my skin is the word "at."

Yes, ending a sentence with a preposition is not recommended, and I will admit that sometimes, it is simply easier and better to do so. In this case, however, the "at" is completely unnecessary. "Where are you?" is a perfect sentence. Putting "at" at the end turns it into a discordant monstrosity. So will you please drop the “at”and just ask where I am?