Blogging manners

Are their unwritten rules for this whole BLOG thing? If you would have asked me this an hour ago, I would have foolishly said, "Common Sense should be enough to guide people." Oh how wrong I would have been. I just got off the phone with a friend of mine who had a Blogging horror story. She went on a few dates with a guy, but it wasnt going to work out. It ended and that was the end of that or so she thought. One day she was with some of her friends talking, and the conversation turned to this guy. Her friends were acting funny (more than usual) and she found out that this guy had been putting everything about their dates on his BLOG (along with a few added exaggerations). He was now venting his frustration with her, and to make matters worse her friends had been reading it and even commenting on some of the things, but none of them told her. Of course, she got onto the BLOG and read all about their dates, and for some strange reason she was upset. I have to ask myself a few questions that seem obvious to me, but maybe they arent so easy. Did this guy really think that this was a good idea? He knew that all of her friends read it, did he think that she wouldnt? Do you think that their was ever a point where a little voice came into his head and told him that this might not be the smartest thing to do? I would contend that this guy is an idiot, and has officially joined the ranks of the socially inept (I actually wanted to say socially retarded but that wouldnt be politically correct). I might be turning into a pessimist, but I am begginning to be astounded at the large number of really stupid people that are out there. So my conclusion on the whole matter is this: I cant trust in common sense to guide people, because apparently common sense isnt so common!!