I would assume a device that records data is already fair game for evidence by legal means. If you want to get technocratic about it, you'd need to start arguin

I would assume a device that records data is already fair game for evidence by legal means. If you want to get technocratic about it, you'd need to start arguing that this kind of tool is an extension of your mind/consciousness of which you are currently entitled privacy to (probably more due to lack of tech than strong ethics). But there's no tech the government does not want to regulate, so your version is probably right.