Legally Drunk

I'm a little confused.

I'm reading an article that tells the story of who was responsible, and should be responsible in an alcohol-related automobile accident that resulted in the death of a minor. Details of the story aside, the term "legally drunk" was used multiple times.

Now. I know I'm reading waaaaay too much into it, but one would think that being legally drunk would mean that you had consumed alcohol, but had maintained a BAC of less than your state's legal limit, usually .10 or .08, depending on how cool your state is.

Everybody says, "the legal limit in (my state) is .08." That would mean that the illegal limit is anything above that. .09, .10, .40.

Now in the article, it says the girl who was driving was legally drunk. They mean that her blood alcohol level was above the legal limit. Of course, she was underage, so anything above a .00 is illegal. They should be saying that she's illegally drunk, right?

Am I just being weird about this, or do I have a valid argument?

Basically, what I'm trying to say is that if you are drunk, and you are above the legal limit, the you should be called illegally drunk. If you are drunk, and you are below the legal limit, then you should be called legally drunk. If you are sober, and not a celebrity, you should be called legally sober. If you are a member of Congress, then you can be called illegally sober.

'nuff said.