The Great CNET Spam-off
Spam & E-mail
'CNET contributor Matt Lake opened 12 free e-mail accounts (and monitored some older ones) and dedicated each to one typical online activity. He even opened accounts at each e-mail provider and left them untouched just to examine the myth that just having an e-mail account can generate spam. Next, he joined up at sites that require you to register an e-mail address, posted messages on message boards around the Web, registered domain names, and visited chat rooms. In each case, over a few months, he checked to see which activities attracted the most unsolicited e-mail to an account, then tried to figure out how to remove the spam. Finally, he categorized those behaviors in terms of high, medium, and low risk, and the results were somewhat surprising.'

Some activities commonly thought to be spam bait aren't. Cool.