2. Without going too much into the details I would personally prefer spatial declarations of private space. For example the space that is occupied by your home and the space that is constituted by a sphere that encloses your body. Ideally everyone should have the possibility to consciously decide which information leaves this space.
3. I think you misinterpret what I said. It's only about declaring a space in which you don't have to think too hard about the (wider) social implications of your actions and thoughts. It's more about protection than about equality.
4. Well, you are still free to reveal yourself within a confined or even public space (in person, using an avatar or anonymously). I could imgine too that this will amplify the endeavor for individual perfection (which is an inherently human trait I believe) but it seems to outweigh the downside of having to potentially explain all your actions and thoughts, or to achieve a society that is able to handle that.