Consumers of Internet pornography who secretly signed up for memberships on adult-oriented Web sites in the past few months may be in for a shock -- some of their personal information, including e-mail addresses, may have been compromised by a security breach. Though the breach, which potentially could affect tens of thousands of customers, reportedly did not involve the theft of credit card information, it could nonetheless have a significant impact on the lucrative Internet pornography industry, according to those who monitor the market. These observers note that online porn relies, as much as anything else, on the promise that...