Some of you will find this relevant and funny:

Keeping a Lid on Your Blog
"Question: A very outgoing young man in my class ('Troy') keeps a blog (Internet diary) about his schoolwork, partying, and politics. As I read his entries, including his grousing about my class, I tell myself that I am not eavesdropping, and that he is entitled to write whatever he likes in a public forum. Yet his field is public-school teaching, for which I think his openness about his life might hamper his chances of getting a job. Should I advise him or let it go?"