No, you got me wrong. My position is that I don’t want anything that is capable of recording and that looks like an object that normally can’t do that. So I tried to imagine how something may have camera to capture what user sees, but not be able to store the recordings - only process it in like real-time, or close to it.

I may not understand the hardware design good enough, but I think if you make an open source device, it should allow custom firmware. If you allow custom firmware, someone will write a version of it that will work around the restriction on recording somehow. To be clear, I’m not concerned about communication protocol interception, but about someone changing how such device handles the data it captures.