In the old days (20 yrs ago) there was massive paranoia that packet sniffing hackers would steal credit card numbers passing over the wire.
As it turns out, the use of credit cards for online payments is insane for a different reason: E-commerce system databases themselves are vulnerable. Credit cards were never built for this. Better systems exist: Paypal, Dwolla, Bitcoin.
The universe is sending us a message: it’s time to evolve.
Corollary: Giving your credit card info to an online merchant in 2014 is the data equivalent of unprotected sex. For the love of God, please stop.