[clamav-users] Heueristics.Structured.CreditCardNumber ???

[musc]

This is another frequent hit I get doing a clamdscan: Heueristics.Structured.CreditCardNumber

I've read of a scam which prompts people to apply for a credit card, or says falsely that a person has already a credit card... responding to either leads to a scam.

Are eliminating these two scams the only reasons for searching out files containing credit card numbers? Or are there other reasons we should be aware of?