&gt;I guess I don&#x27;t see the distinction.<p>Do you see a distinction between me taking a photo of you by being out in public being my right and me using a special camera to pick up photons emitted by your body and not blocked by your clothing and creating an image from these?<p>Do you see a distinction between me being able to look into your window from the public sidewalk and me using infrared technology to map out everything you do in the house?<p>What if I invent a camera that can take a photo of a letter and reveal all the contents inside in easily readable detail, without needing to touch the letter.  By you grabbing a letter out of your mailbox, you are letting me see the outside of it, so if this camera can capture the content is there any significant difference?