Its so hard to write your true feelings down without insulting or embarrassing someone. How are we expected to make the journals real and personal if we constantly run the chance that someone we know or have written about will read it and judge us or tell someone else we know... That's the main thing I worry about, I think...
I used to keep tons of diaries but then the time lapse between entries would get so large that I just put an end to formal journal writing. Nowadays I just write mini-stories or little diary entries on the computer that I read when I'm sad/furious/depressed...
Yeah, I think everyone have to document and vent their thoughts/feelings in some why or other... music is one way, my sister cleans the entire top floor when she is angry (which is quite awesome for the rest of us ^_^), some people do art (although art makes me anti-social), and others resort to eating... I dunno, maybe this is the reason why so many of my fave artists are or seriously considering leaving devART.