Given how ubiquitous Androids, iOS, Kinect, OSX, and Windows devices are, no. Chances are if you are in any populated area, a camera (and perhaps more importantly, microphone, given that mics are omnidirectional) associated with one PRISM company being on you is extremely high. Glass would merely be a snowdrift on top of Everest.

Of course, it is important to note I don't believe PRISM is anywhere near as effective as many around here do.

I agree with you that the ubiquity of microphones cameras without hard electrical 'off' switches is a real problem. Secret microphones have been used for eavesdropping for a century now, and malware has been found in the wild which uses the camera to take photos and make 3D reconstructions of the victim's home interior.

But wearing an internet connected 3rd party controlled camera on your forehead is categorically different than one that points at the inside of my pocket almost all the time. If it were the same as what we have now then Google Glass wouldn't be a very interesting product, would it?