I doubt this surprises anyone:

Classmates.com was sued because it allegedly sent out e-mails to anyone registered for its free service, suggesting that their fellow graduates were looking to contact them—they could find out who that person was if they'd simply upgrade to one of the subscription tiers. At least two individuals did so and quickly discovered that the mystery classmate didn't exist—nobody they knew had been looking.

Still, this is good news because companies shouldn't be allowed to lie outright the way Classmates has.