You want to hide your online activity, you can have some degree of privacy if you were to use an ecrypted proxy server. They may still see your traffic that runs between your computer and the server, but it is all encypted, and they can't read it with out a lot of work.
But facebook scans the internet looking for members on thier site AND THEY ADD WHAT THEY FIND TO YOUR PROFILE!! (So even stuff you didnt add to FB gets added by them) FACEBOOK IS NOT A GOOD PLACE TO BE!!
anyone can get in to a computer dosnt matter if its the fbi,your spouse or an employer its all open to whom ever has the skill.the key is to not share pertinant information,miss inform like the fbi/government does or just plane have nothing of interest going on in your computer life.people get all excited about big brother,well i am the youngest of six kids i have had big brother/sister watching me all my life and they still think i am the good kid.you just have to be smarter then the people watching you,not hard to do since there interested in you will make them forget to watch there own indiscretions.
all u need is an address and u can find anyone.i spent one evening talking with the grandaughter who was drunk and insisted we needed to come get her except she didnt know where she was so i sent her to find an address when she gave me one i looked it up on google earth and saw her stumbling around in front of her soon to be husbands parents house.no mater what you cant hide as long as u r part of the world.
Your not taking this seriously! Most ppl dont give a rats tail about thier privacy (they have been reprogrammed not to care) and JUST HAVING THIER EMAIL ADDRESS can produce all kinds of data about them! GO here and enter an email addy of someone you know is NOT AWARE,etc (Someone who is on social networking sites): www.spokeo.com Someone entering ANY OF MY EMAIL ADDRESSES will produce Jack!!