Just stop with all the RFID bullshit on credit and debit cards! Really, is that extra few seconds taken to insert and enter a PIN such an onerous burden? People in that much of a hurry aren't likely to use that precious sliver of time to stop and smell the roses anyway.
For those worried about cell phones and the like, I suspect the new-style duds will do little or nothing to impede those signals. They're a couple of orders of magnitude higher in frequency than the current RFID payment systems, and they use far-field RF, whose intensity falls off with with the square of distance. The intensity of Near-Field Communications falls off with the cube of distance, and is more 'magnetic' than 'electro' in nature, so the shielding mechanism tends to be different.
For myself, I plan on de-activating all of my contactless payment cards by breaking the antenna loop with a drill, as soon as I can get them imaged so I know where the antenna traces are. I've already had my banks disable the feature, so in theory I shouldn't be able to make contactless payments, but that won't stop info theft via unauthorized readers.
And yes, I DO wear my tinfoil hat proudly...