"Police and prosecutors are worried that a Web site claiming to identify more than 4,000 informants and undercover agents will cripple investigations and hang targets on witnesses."
"The Web site, www.WhosaRat.com, first caught the attention of authorities after a Massachusetts man put it online and named a few dozen people as turncoats in 2004. Since then, it has grown into a clearinghouse for mug shots, court papers and rumors."
