Revealing the existence isn't anywhere the same as revealing the guts of its operations, which for all we know could allow compromise or direct access. PRISM i

Revealing the existence isn't anywhere the same as revealing the guts of its operations, which for all we know could allow compromise or direct access. PRISM is bad enough in US hands, but can you imagine if Oceania/Arstotzka got their hands on the data? (irrelevant countries as to not have to argue that)