Don't get me wrong, I'm as keen to pin it on the NSA as the next suspicious flapper. But given the anti-America stance of Chavez-era Venezuela I'd be willing to lay an each way bet on other actors in this particular caper.
It will be fun finding out in the papers 30 years from now.
Proverbs for Paranoids No. 5: "“Paranoids are not paranoids because they’re paranoid, but because they keep putting themselves, f***ing idiots, deliberately into paranoid situations.”