It's been awhile/since I've gone...

It has, indeed, been awhile since anything appeared from me. I could argue wedding (since I married a few months ago), I could argue illness (since I fell ill in early February), I could argue sheer laziness (since I am), but none of those would be entirely true.
I tend to go through phases where I don't particularly feel a need or even a desire to share my thoughts, feelings, or experiences with the world, or even to commit them to any sort of pseudo-permanent form. I don't believe that my thoughts, feelings, or experiences are particularly world-changing, and therefore see little point.
But then my inherent vanity (because, come on, isn't that the point of these things) once again rushes to the fore and demands its tribute. So once again I put fingers to keyboard, so to speak, and type out whatever I feel like sharing at that moment.

Today, I feel like ranting a bit, and also asking a question. There are several people I know, who have recently gone through awkward and/or difficult situations that they don't want the general population to know. (Honestly, I think we all have those at times)
With me so far?
Why, then, do they post links, comments, rambling page-long quasi-diatribes on their own webpages, blogs, social networking sites that refer to what they went through? Doesn't that defeat the purpose of requesting secrecy?
I've read numerous articles and reports that on the internet, it is more likely for people to post personal information, because somewhere along the way the knowledge that SOMEONE ELSE COULD SEE IT (most likely someone you don't want to have know) gets lost. The internet comes across as wonderfully anonymous; "no one could ever figure anything out about me from the seventeen pictures I've just posted, complete with names, dates, and locations" seems to be the common prevailing thought.
I often bemoan (usually to my husband, bless is patient soul) the lack of sheer common sense that seems to prevail in the world today; it makes me want to bang my head against a wall because honestly, how can people really be THAT STUPID and still have learned to walk, talk, and share personal information with the world?
Yes, I confess, I am guilty of it too--to a degree. I put up as many filters as possible on who can see just about anything that I may not want the whole world knowing. I'm bipolar, I'm borderline personality, I'm not ashamed of those things. But there also aren't any awkward-to-humiliating photos of me floating around in cyberspace, either.
If you post something personal, and others find out, what right do you have to get upset about it? If it spreads like wildfire that "so-and-so did X with what'shisface," and so-and-so gets mad about it because, "like, come on! my MySpace is, like, personal and stuff!" they have only themselves to blame.

Sometimes I despair for the future of the human race.