99luftballon writes "If, like me, you're more than a little concerned about the privacy aspects of RFID there's a useful enthusiast's web page on making your own RFID-blocking wallet. OK, it's never going to win any prizes for beauty or garner fashion awards but should be effective and seems perfectly practical. "
You can tune a piano, but you can't tuna fish.
You can tune a filesystem, but you can't tuna fish.
-- from the tunefs(8) man page