The ISP knows who you are from your IP address and your surfing habits from feedback from their DNS Server. They now have a record of who you are and which websites that you have browsed. By-by privacy. By the way if you have Digital Cable and/or use a Cable Card your viewing habits can be tracked, down to what channel you view and when.
If you surf with Tor, methinks thou has no worries?
What if the exit points of TOR are on ISP's that collect clickstream data? Although that info wouldn't be of much use, since it represents 100s/1000s of people that you can't do any statistical modeling on, since it looks like 1 person.
