One of the recommended reading, Jill Walker’s article on Weblogs:Learning in Public (in On the Horizon, Vol 13, Issue 2, 112-118 (2005) is a personal experience of a tutor who was brave enough to  introduce ‘public blogging’ to a class of UG-students.
Done as part of a small scale study she investigated the experience by students that other Web-users ‘find’ their Blogs by using backtracking or bidirectional links.  TrackBack allows two blog entries to link bidirectionally not only by allowing a blogger to comment on another person’s blog by creating one link on their own blog to the other person’s blog but also by creating a second link on the other person’s blog to the blogger’s blog, thus creating a bidirectional link.

For most student this was an unexpected if not frightening experience who relied on the vastness of the Web to remain anonymous.
In one particular example a (female) student had blogged about the personal comments of another (male) student’s blog, again in a highly personal manner only to find out that the (male) student had not only read her comments but also placed a link to the girl’s weblog thus inviting other students to visit her site.

An important aspect of this work was the consideration of an ppropriate code of conduct when blogging about other people’s blogs, as it is important to repsect other people’s feeling when they write in what they consider their ‘personal space’. In essence the blogosphere is just the opposite a large and open arena, a debating club which stimulates dialogue. The same may be said about the virtual ethnographic project where commnets are made in public about the workings of a particular online grouping.
Just don’t assumet that the people who are commenting about won’t read it.