how the FBI is watching the net

some details of the FBI's net surveilance technique have been made public last Friday at the Search & Seizure in the Digital Age symposium held at Stanford University's law school.
basically, this is what they are doing:

- if there is a badguy they want to watch, they get a court order and if the Internet Service Provider can tell which IP address the badguy is on, they watch a whole block of IP's.

every time you sign on the internet, you get an IP address. this comes from your ISP, and with always-on connections, rarely changes. but if someone with the same ISP is being bad, the FBI will watch a whole set of IP's to make sure they get 'em. and by watch, i mean record all net activity. email, web requests, etc.

source: http://news.zdnet.com/2100-9595_22-6154457.html