The Lounge is rated Safe For Work. If you're about to post something inappropriate for a shared office environment, then don't post it. No ads, no abuse, and no programming questions. Trolling, (political, climate, religious or whatever) will result in your account being removed.
If you're concerned, RFID can easily be shielded by a layer of aluminum foil. I'm sure there are still readers that can read through that, but most can't, and all you need, is to be harder to access than the guy next to you.
You can either wrap your card in some aluminum foil, or make your own duct tape wallet and put a layer of it between the layers of duct tape. If you go the wallet route, just be sure to leave an unshielded pocket on the outside someplace for your RFID key card for work, as it's really inconvenient to have to take the card out of your wallet every time you want to get in the door
We can program with only 1's, but if all you've got are zeros, you've got nothing.
There are districts in Liverpool where the land for housing was purchased from Quaker families who added covenants on the land that the sale of alcohol was prohibited - that means that there are areas with no pubs at all!
In other areas, from Victorian times there was literally a pub on every street corner (though many have now closed). I have lived in both types of area, and I know which I prefer!
I'm an optoholic - my glass is always half full of vodka.