The Flaw in Blogging

I think there's a serious flaw in blogging. Ok...maybe not so serious, but definitely a flaw. This is only one man's opinion, so don't shoot me for it.
When I started this, I was thinking..."O cool...I can share this with my friends". But then the more I thought about it...it wasn't so cool. Here's why. Blogging is like a place where you can let your thoughts go without being punished for it, but sometimes when you let your thoughts go...negative things will come out. Whether that negativity is directly towards something silly or towards something serious, all I know is that if something negative is written about someone you know...and they happen to read it...you're going to be in some deep sh*t. It's easy to say..."well, just don't write anything about a person you know that will read this". But then what's the point of having a blog and sharing it with friends? Maybe I'm wrong. Maybe ppl write blogs only to share with strangers who don't know them so they won't be judged? I just can't see being completely open if you were to share this with friends and be completely honest in your opinions.
Well, with all that said, I hope none of my friends will read my blog because I'm sure I'll have some nasty things to say in the future if someone should piss me off enough. Other than that, I wouldn't waste my time.