[ccppurcell]

So what? If we need unscrupulous people to tell us what other unscrupulous people do, so what?

[stavros]

Nothing, just keep in mind they're still unscrupulous.

[ChrisMarshallNY]

That pretty much describes confidential informants (used by the police, all the time). Many of these CIs are risking a lot more than just getting sued, and they are seldom angels. Many of them do it, so they won't go down with the ship, or because the cops have real leverage over them.