If people are interested in learning more about OPSEC and how to actually protect secrets (i.e. guard your privacy), this is a good overview of the issues.
As always, my focus is on hackers, but the issues are not solvable with technology (alone).
There is a really good video of OPSEC by grugq on YouTube from Hack In The Box Security Conference. Basically gives you some rules and things to think about, but also talks about where lulzsec went off the rails, and how they were caught. Really interesting talk.
In the not-too-distant future, doing things on the internet that we currently consider mundane and ordinary will require using alternative identities carefully compartmentalized from our real identifies using the type of OPSEC he describes. I'm practicing this now before it becomes more critical.
The authorities view hackers as modern day witches, something to be feared and destroyed.
The story our of our era is the third option: co-opted.
That is a lot less common than many people like too think.