Part of the subscribing process is reacting to the mail you'll
get from Bravenet after you entered your information here.
It's in your interest, so that no one else can just enter your mail addy for fun.
As long as you haven't reacted to the confirmation you won't be part of the list.
(Look in your Spam box too, since that's most of the time where the mails from Bravenet end up.)
Thanks for your interest!!