To address your points, there are no plans for your bookmarks to be public, or have an option to show a page with them, either. The nature of the site doesn't lend itself to public bookmarks at all, as there is no list of bookmarks to publicise in the first place. To make it public we would have to add a search box for people to search in your bookmarks, which may or may not be useful...
I see what you mean about it, and I agree, but many people have said "I will never use this if I can't have privacy", so we listened to them. It might, however, be a typical case of the users not knowing what they want, because nobody seems to mind facebook...