The Journal's investigation demonstrates how fundamental Web technologies can jeopardize user privacy.

WSJ: MySpace, Apps Leak User Data

Aleksandr Belykh, the head of the abuse department of FirstVDS, said the user of the virtual server identified in the City Newsstand investigation is Russian, and his firm hadn't received any complaints about it.

WSJ: Hackers New Target: Small Firms With Lax Security

That threat to consumer privacy unleashed a storm of protest against the company, as well as a Federal Trade Commission investigation and a class-action lawsuit, which was settled only in 2002 when DoubleClick agreed to make user data anonymous.

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