Facebook, My Space, You Tube....What's it all about?

Well I went and got one of them there Facespacetube book things.
Basically I wanted a way to keep my eye on my trouble seeking spawn. So, I have a Facebook, I think. I notice that the dang thing knows who I know without me even asking?
I mean many of YOU are on this thing that asks me if I want to be YOUR friend!
What's up with that?
Big Brother IS Flippin' watching me now.
Well that's fine cause I am watching all of YOU.
So, if this sort of thing brings you enjoyment, go look for me on that facespacebook thing.

On a related note: I am DEAD SET AGAINST MySpace.
So some expert tell me: is there much of a difference?
I really do not like the things that are on MySpace. Just the ads alone are filthy, but some of the stuff that kids and adults post is just plain foul.
What I found in my study of it a year ago or so was that even nice innocent kids were being exposed to a lot of really dirty garbage.
So is this Facebook thing any better? Is there more control of content?
I mean I watch what junior does on the computer and we found some really nasty videos on You Tube that he didn't necessarily watch, but he saw the pics at least in passing.
How do you as parents feel? In light of the ol' Scripture: "avoid all APPEARANCES of evil"?