Most people may think they're smart enough not to answer an obvious spam message. But is that really the case?

Almost one third of consumers questioned admitted answering e-mails they suspected were spam, says a survey released Wednesday by the Messaging Anti-Abuse Working Group (MAAWG).

Among those who responded to spam, 17 percent said they clicked on it by mistake, 13 percent said they sent a note to the spammer to complain, while 12 percent said they were interested ...