Gregory says the ruse was designed to steal his online address book.
"As soon as I clicked it I got these e-mails from my wife and best friend saying, 'What the heck is this? Should I touch this?' It made me so angry I wrote about it," explains Gregory.
The New York Attorney General's office says Gregory was one of 60 million people allegedly duped by Tagged.
The allegations involve a practice called contact scraping.
Security experts at Symantec in Culver City say it's a growing, invasive form of identity theft.
"That means it goes into your e-mail address, looks for all of the people and contacts you have in there and it automatically sends messages out to them on your behalf. If it is happening without your knowledge then that is abusing someone's privacy and trust," said Vincent Weafer from Symantec.
Investigators say a Web site uses one person's e-mail address to lure his friends and associates into giving up their personal contacts.
"It's like breaking into somebody's home, stealing their address book and sending letters to all of their friends and pretending to be them," said Benjamin Lawsky from the N.Y. Attorney General's office.
Symantec recommends being very careful with any social networking Web site.
"Don't use the same passwords for lots of different server providers, social networking sites. Change it around. We know it is difficult, but there are programs that will manage your e-mail and passwords across different systems," said Weafer.