Military Recruitment in our Schools

So just a quick question. If you opted out of military recruitment when your child attended Cardozo High School and your child graduates, does the DOE give that information to the recruiters anyway? Middle one just had a phone call from the US Army saying that they have his phone number as a recent graduate of Cardozo High School. Now, how do I prove that the DOE gave that information out and do I now have to call Cardozo and lay down the law. This is crap. He is gone and still I have to deal with the multitude of red tape to get his name off of some list I did not want him on in the first place.