http://keybase5btp2qikoau6u326pvotn47gb55mo6fjxxyxdoywiinomr5id.onion/blog/2014-10-08/the-horror-of-a-secure-golden-key
Whether you're a regular, honest person, or a US legislator trying to understand this issue, understand this list. Threat #1. It Protects You From Hackers If Apple has the key to unlock your data legally, that can also be used illegally, without Apple's cooperation.