Blogging the truth?

I suddenly have this through, do people really blog about the truth from their heart? Some people will say yes because it's their blog it acts like their diary so they can write what they like. But then blog is consider as a open diary, anyone can see it online. So if ever the person that you don't wish to let them see your blog happened to see it and got upset with what you have written, how will you react? You can't control one's thinking, it might be just a thought of your mind but they take it seriously how?

In my point of view I think you should know who are the group of people who will read your blog. Then you should just know what are the things you should and you can blog about. Although it's you blog but then...everyone can still see it. Haha Well I'm blogging rubbish again. That's the way I waste my time. hahaha