RIFD blockers - great info

Exactly what I have been saying about RFID for years.

And coincidentally, another article on the topic:

http://www.npr.org/sections/alltechconsidered/2017/07/04/535518514/there-are-plenty-of-rfid-blocking-products-but-do-you-need-them

It's pointless. Hackers will aim for retail credit card processors' databases, install skimmers in retail stores, or just hack the bank itself. They won't go for individual credit cards. There is literally nothing you can do to avoid being hacked.

And if you think you need a RFID blocker, consider Aluminum Foil Hats:
https://www.theatlantic.com/health/archive/2012/09/tin-foil-hats-actually-make-it-easier-for-the-government-to-track-your-thoughts/262998/

The scientific reasoning behind the foil helmet is that it acts as a
Faraday cage, an enclosure made up of a conducting material that
shields its interior from external electrostatic charges and
electromagnetic radiation by distributing them around its exterior and
dissipating them. While sometimes these enclosures are actual cages,
they come in many forms, and most of us have probably dealt with one
type or another. Elevators, the scan rooms that MRI machines sit in,
"booster bags" that shoplifters sometimes use to circumvent electronic
security tags, cables like USB or TV coaxial cables, and even the
typical household microwave all provide shielding as Faraday cages.

I'm taking my cards in a microwave. There is just one problem. If it is in a microwave how can it be cold cash?

Haven't we had quite enough of experts?
Opining at all hours about what we should or shouldn't believe?
If I need more confirmation of what I already fear,
I will turn to the sources I trust, helpfully placed before me by
Rupert Murdoch or David Pecker.
Along with a packet or three of crisps.

[Edited to add a big /s for clarification]