Not shocking, but noteworthy and food for thought... as reported by Kevin at Real Lawyers Have Blogs, Blogs are being used as impeachment material for witnesses in lawsuits.
Along with the ease of publication that Blogs offer, don't forget that they are publication. Might Blogs by their ease of operation allow someone to publish before the complete thought process has been performed? I think so. Might this be a danger in Blogs?
Maybe just a danger in people.
Rule of thumb... Think... then publish. It is also helpful to run a draft by an associate, first.