While well-intentioned, I don't think that credit-card verification would be int he best interests of flyerTalk.

These trolls represent a very small portion of our community, and they inflict their damage on fairly limited scales. 95% of fT has no clue who some of these people are, and don't care.

It would be a travesty to scare away a good portion of those who come to learn about points and miles in the name of weeding out a few bad apples (who, by the way, would almost surely find a way to defeat the verification, anyway).