AWACS,
Remove all your internet cookies, disable them and try the exercise again. PPrune wont have a clue who you are.
But you will lose little functions such as "new messages since last logon" and "preferences".
Crashdive or Pprune Dispatcher wrote a very interesting message about anonymity about a month ago, I forget the topic title but you should be able to search for it in this forum.
Mutt