Well we do have mod forums where users can interact with each other on there coding ideas. Your needs are not in the program since contents are not designed to be anonymous. I guess what you hide and where you hide it depends what your trying to hide.
Example if your trying to hide photos from the recent random blocks then you say would modify the display_gallery in pp-inc.php and say elect to not show photos from that category by maybe adding something like this to the queries
Content visible to verified customers only.