This may only work for dialup users.
Find a way to open an account with an ISP with payments being not tracable to you, eg- bank account not in your name.
When dialing, withhold your number. Some ISP's in the UK allow this, I don't Know about the USA or elsewhere.
They will not be able to trace you through your payments or the phone line you connected with.
Like I say, its just a thought,, or is anybody already doing this? :'(