It's interesting, isn't it? Not very long ago, it was important to people to maintain certain kinds of privacy, a "healthy paranoia", a division between the lives they led at work and at home and elsewhere.

Now, there are a lot of people asking that same question: so what if an advertiser knows more about my habits than I do? So what if someone from work sees my vacation photos?

And, maybe, if everyone sort of agrees that all this is OK, then it really will be.

Some people are still clinging on to their healthy paranoia, though. I don't trust any company, large or small, not to harm me if it suits their bottom line -- even if I'm not imaginative enough to guess how they might do that.