There is a great article on the New Yorker web site at link
Klausner and others embarked on studies that concentrated on the use of the Internet, on attitudes about aids, and on the role of methamphetamine in gay life. The results were hard to misinterpret: the Internet has turned out to be a higher-risk environment than any bar or bathhouse—men who meet online are more likely to use the drug, more likely to be infected with H.I.V., and less likely to use condoms.