TMI????

Is there any type of line that people dont cross? Is it a lack of anything noteworthy to say? Is it to get attention? Why is it that some people have no problem throwing the most random/personal crap out into the world? Don't get me wrong I love reading interesting tidbits on people's lives and whatnot (cause I'm a super nosey freak and can't help myself) but sometimes I'm baffled by what I read on-line. Is this the new version of "Dear Diary...." where nothing is off limits?