"Welcome Admitted Students"

So says the sign on the door leading into the Law School. Why not just "Welcome Students"? The people we didn't admit aren't really "students" at all, are they? Or is it "admitted" in the sense that they are willing to openly proclaim their student status--like an "admitted drug user" or an "admitted adulterer"? But we welcome our students whether they're keeping their student status a secret from the rest of the world or not.