What does this mean, "specifically compromised"? You bought it compromised if we are being congruent with these sorts of accusations or precautions. If you assume the Echo is always listening, you should also assume that Apple, Google, and Facebook are also always listening... and, in fact, I recall earlier this year a quite vast conspiracy that Facebook did exactly that[0]. This was denied by Facebook, for the record – or do you not believe them?

0. http://www.independent.co.uk/life-style/gadgets-and-tech/new...