The point of the data about birthdate and Zip code isn't that knowing those allows someone to figure out who you are, it's that those data are adequate to operate as a PK for people in most circumstances.
If you really want to see how much is already available about you out there, take a look at http:\\snitch.name. It's pretty darn easy to find out data about someone on there. It's not really paranoia to assume that everything about you is already known.
Privacy is an illusion. The difference between now and 100 years ago is that now it's cheaper and easier to find out someone's facts. That's all.
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread
"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon