People said the same thing about personal computers and smartphones, and to some extent it's true that they can be compromised to spy on you.
Of course, the same thing goes when hiring housemaids and gardeners. If you're a drug lord, you'll always have to vet your companions, surroundings and comm devices
No doubt, but bear in mind that NSA's target is foreign nationals. So unless you're using the gizmo outside the US, or are inside the US using the device to send messages overseas, they're not interested in you.
Now the FBI, on the other hand, _is_ tasked with internal security...
I wouldn't worry about that... unless your boss gives it to you a present. Then I'd be a bit suspicious