I have a reasonably high profile job, so when you google my real name quite a lot of the results are about me.
Hence, I'm very wary about my online footprint. I use my mother's maiden name as my surname on Facebook, different screen names and different email addresses for different sites, I never post my phone number in online small ads etc
I'm very concerned about the high-handed attitude taken by some organisations towards our privacy. They seem to just assume everyone is happy to share every aspect of themselves with everyone else. And it's not just what we post online that reveals out inner life, it's also what we search for that can give others an insight into the areas of our personality, interests, state of health or emotional problems that perhaps we would rather were not reveal to the world at large, but least of all close friends, colleagues or family.
I'll give you an example. I used a communal computer at work to do some ebaying. It seemed that on a previous occasion, on my computer at home, I had searched eBay for, amongst other things, some things that I'd rather my colleagues didn't know about (it was either large sized condoms or vibrating cock rings). Even though when I searched eBay using the work PC, I'd only looked at innocuous items, the very fact if logging into my account had downloaded cookies onto the communal work PC. The result of this was that the next person who opened up eBay on that computer was presented with a page which not only contained the generic eBay stuff, but also a list of "your (ie: my) recent searches", including the condoms and cock rings, and suggestions for similar items such as generic Viagra and, IIRC, anal lubricant. What. The. Fuck?
So, eBay think they were being "helpful", but I think they were acting like a friend who can't keep a very personal secret.