Yeah, that's what I thought, thanks (even you, Rudy

)
In fact, I'm planning to go to a T1 sanctionned tourney next saturday (21st) and the TO says he's not allowing Darksteel because It will allows people who have an easier access to a huge card stock to get the good cards (Trinisphere!) while the others won't be able to. Is he allowed to do that? I don't think so, but I can't find a confirmation somewhere in the rules :<
Nothing in the DCI rules allows the TO to specifically exclude a set that is legal in the format.
You may want to remind him of that. If he continues with his plan, you should notify the DCI.