The NRA is selling a wallet which shields your RFID cards from being scanned.
I’m a little torn as to whether I want to get one or not. It’s very convenient to just swipe my wallet over the the scanner when I get on the bus to go to work. If I had the shielded wallet I would have to take the card out to scan it.
On the other hand Ry recently demonstrated an app for an Android phone that could scan that same card and get my public transportation history for the last 10 days.