As if it makes a difference. Legendaries altogether should be banned, whether they are or not at this point.
Legendaries like Azelf are quite a bit weaker than legendaries like Lugia. Garchomp, Dragonite, Metagross, Tyranitar, Salamence are up there with the weaker legendaries, so banning all legendaries and leaving them alone is...odd (couldn't think of a better word... >.>).