To the best of my knowledge they prompt you and ask you who you want to follow. This was the case for me. They don't automatically follow - unless you click the OK button.
Turning off buzz is literally one click away at the bottom of the screen. I know because I used it.
This is also shown in the Google buzz demo video.
Responsibility lies on you when you decide not to edit the follow users and check privacy setting when its right in front of you the first time. The only way forward is to click OK, thats what you did like everyone else who is complaining and going ra ra about privacy.
Upon proceeding in to Gmail, I found that I was participating in Buzz, with IIRC 14 follows.
My more general reaction to this situation, including a similar, serious security implication for a close family member, I'll comment on elsewhere in this thread.
Briefly: You fucked up bigtime, Google. The people truly responsible for this need to be terminated.
I didn't watch the Google Buzz demo video, because I'm not interested in Buzz. I shouldn't have to watch something I'm not interested in to find out how not to take part in what I'm not interested in. It also took me quite a while to figure out where the turn off button was - since its not in the normal settings, where I would expect to find such things.
There were already messages there. They were almost all about how to turn off buzz.
Clearly you have option to edit your followers list and change privacy setting (which was the complain I was referring to). If you choose not to do anything about that and ignore the prompt and go ahead click OK. Should you not take some responsibility for it? I am not denying that google auto following is not in bad form I am just pointing out that changing/editing it is extremely easy and right in front of you.
As for turning off buzz. It is at the bottom of your gmail window. One click away, but not obvious.
Oh right, "we don't like his comment, let's get rid of it." Jesus, people, behave.
He's making his case based on his knowledge of the situation and he's doing so in an educated manner.
Me, personally, I'm in his same situation. I can't understand how people got automatically added to that Buzz thing. The link appeared in my Gmail account and I never clicked it, NEVER. I just turned it off when I learned how.