I think blogging can be a really brave act. Either you put your thoughts, opinions and experiences out there in a public way or you keep it private and limited to a select audience. Either way, you're still opening up a journal or diary, traditionally something very private, to the reactions of others. I have been on both sides of taking a blog personally and reacting to it - it's no picnic.
My mantra now when I read blogs is: It's not about me - it's not about me.
I think the blogging experience might be a bit smoother if more people tried that.