But do we have a different kind of responsibility to let our students know we're reading their blogs if they haven't identified themselves on it nor have they openly identified us yet we know who they are and that they're, in truth, writing about us?It is an interesting question. I am not sure I have the answer.
With my particular students, I can't imagine being hesitant to share my blog or to read their blogs. I would do this openly. But I am teaching adults, men who are studying for the priesthood. (My students currently don't even have access to blogs because of current Internet policies in place.)
I think the issues might be different for high school teachers. Bud has talked about similar issues over at his blog. So have other people; you can read some of the discussion here and here.