The difference is that I don't pretend that any of you people are my friends.
That might just sound like I'm being an asshole (which is fair), but think about it for a moment.
I don't tell Slashdot that I just ate an awesome burrito.
I don't keep Slashdot up-to-date on my relationship status.
I don't announce to Slashdot every time I'm super excited that my bff is having a cookout in 3 months.
I tell Slashdot that I think they're wrong on the internet.
Unless an employer is particularly interested in how I feel about lawyers (some of them are alright, some of them suck, pretty much like everyone else) or how great Planscape: Torment is (it is the best written video game ever) or whether or not Disney can afford to hire Harrison ford (of course they can, don't be foolish) or any of the other inane, mostly irrelevant crap I've commented about here, they aren't getting much.
That is to say, I'm sure if some stalker wants to track down random details of my life from sources on the internet, they can, and at this point I can't really stop them. That's just part of living in the future.