Seriously, F-R? Wow, I have just the opposite opinion. You are a lucky mother! 
... and online message boards?
I know what you mean, though, and I fear the same thing.
I agree,I wish My oldest was only 1/10th as good as I was at his age. I certainly was not a saint.But my acting out did not start until I was 16.Then granted I gave my parents a hell of a time.
I first caught my oldest smoking and drinking at 11.Which really shocked me.Then having sex at 13 going on 14 shocked me even more.As did the fact that despite all the sex education I had given him,he used no protection.
They act physically older than my generation,but mentally and emotionally,I do not think they are any more mature than I was.They just know a lot more.
Their ability to deal in a mature fashion with that knowledge,seems to be lacking to me.
However they are all different.My 11 year old other son bears no resemblance behaviour wise to his older brother at that age.If anything he is on the immature side.Long may that continue.
As for my space and the like.What goes on there appalls me.We do not let our oldest have a computer in his room,but he is so blatant he does not care what we see.Even down to naked pictures of his girlfriend,at which point I unplugged the modem.Only to have him throw an all time major tantrum.
The girls on my space seem so sexually aggressive,even more so than the boys.That also shocks me.But maybe I am just behind the times.I do not know anymore. I seem to be adrift in a world I do not understand .But maybe that is the case for each new generation of parents.I know my parents were shocked by me at 16.
So we continue to monitor his my space, no time on his own with his new girlfriend,not at our house anyway, and keep on at him about safe sex and protection.Because no matter how much we monitor him,he will find a way if that is his intention!!!!!