Not long ago I posted about paying with cash; and how it's a misnomer that "places have to take cash-- it's legal tender." Technically, it's not illegal to refuse cash.
Anyway, now things are getting ever more tighter and scarier; a California town has now banned cash for "public services." And the reason why they're doing this is equally scary: thinking is, you're a terrorist if you want to pay with cash.
California Residents Hit With Government Ban On Paying By Cash