I had a friend who carried around a canceled credit card to get free rides on the bus. The fare boxes accepted swipes and didn't/couldn't settle transactions un

I had a friend who carried around a canceled credit card to get free rides on the bus. The fare boxes accepted swipes and didn't/couldn't settle transactions until they were back in the barn. So they took any credit card that checksummed, I suppose. They ceased this feature soon afterwards. I was appalled that they'd ever enabled it if it was so vulnerable. (I don't think public transit really cares about collecting fares as a priority.)