Terrorists Prohibited from Using iTunes
The iTunes Store Terms and Conditions prohibits it:
Notice, as I read this clause not only are terrorists — or at least those on terrorist watch lists — prohibited from using iTunes to manufacture WMD, they are also prohibited from even downloading and using iTunes. So all the Al-Qaeda operatives holed up in the Northwest Frontier Provinces of Pakistan, dodging drone attacks while listening to Britney Spears songs downloaded with iTunes are in violation of the terms and conditions, even if they paid for the music!
And you thought being harassed at airports was bad enough.