Meh. Just filter what you put on Facebook, or don't use it. I'm not in favor of this, and I do find it creepy, but nobody holds a gun to your head and makes you log in and post status updates recapping your day. It's a trade off - the pleasure/whatever you get from FB vs the creepiness/unpleasantness from them having your information. If the balance tips, re-evaluate using the service.

Post, don't post, doesn't matter. Your friends who do post will give enough information about you that not having an account wont matter.

Nothing stops someone from tagging you in a photo. Nothing will stop people from posting "Hanging with XXX @ YYY". Putting 2 and 2 together: they now know who you are, types of places you visit, and what you look like. And you never made an account. After this your choices are:

- get radical with friends about what they post about you

- give in and use facebook

- stop hanging out with your friends

The "don't use it" argument falls apart when you realize that Facebook builds shadow profiles for people who don't use Facebook.

http://www.zdnet.com/firm-facebooks-shadow-profiles-are-frig...

That stuff is creepy, but I always find claims of such-and-such a company stealing "my data" a little weird when that data turns out to be very public information about me such as my name, phone number and what I look like.

Filtering what you put on facebook will not protect you and not using it will not prevent facebook from profiling you but will prevent you from accessing "free" internet from this places.