Oh I know this. But after the scammer talks it invites the people who have been ripped off by said scammer. And then we get truth. AND JUSTICE!
Wait until you have to make a choice from conflicting information. For instance, MtGox has many fans and is the major financial player, easily. However, in some people's minds they are scammers, crooks, thieves, shady, etc. That is a significant dilemma.