Usual disclaimer applies for those with a clearance: by accessing classified documents on your home computers you could get yourself in serious trouble (in theory). In light of this particular situation I don't know if anyone has ever been punished but you should be careful.
Is it still classified if it's public? Doesn't a thing stop being secret automatically when it leaks out? If it does not then I wonder why they even called it "classified" or "secret". They should call it "blargh" and avoid the confusion.
By not saying anything (neither confirm nor deny), folks with a clearance have to assume it's classified, and they have signed many NDAs and other bits of paper agreeing to not seek access to classified data without the 'need to know'.