> the first question I has was: How would he prevent unintended use of the card's funds?
The fact that most people aren't assholes was sufficient to let the system work for a while. A few people being assholes occasionally is survivable but somebody who makes a system out of it and publicizes it probably isn't. In short: "this is why we can't have nice things."
Think about it another way: right now, McDonalds doesn't charge you for napkins, straws, ketchup packets, salt packets, or toilet paper. All that stuff is just FREE - anybody could take however much they want!
A sufficiently motivated asshole could figure out a way to break that convenient social phenomenon too and it wouldn't take any more cleverness than this did. It's not a cool hack, it's taking something other people find useful and ruining it for everyone. Suppose you systematically stole all the toilet paper and paper towels from Starbucks bathrooms. To sell on eBay or whatever. Eventually they'd have to install pay toilets, hire washroom attendants, or just remove access entirely. One motivated jerk can easily make life a little less convenient for everybody in a great many ways, but that doesn't mean he should.
The fact that most people aren't assholes was sufficient to let the system work for a while. A few people being assholes occasionally is survivable but somebody who makes a system out of it and publicizes it probably isn't. In short: "this is why we can't have nice things."
Think about it another way: right now, McDonalds doesn't charge you for napkins, straws, ketchup packets, salt packets, or toilet paper. All that stuff is just FREE - anybody could take however much they want!
A sufficiently motivated asshole could figure out a way to break that convenient social phenomenon too and it wouldn't take any more cleverness than this did. It's not a cool hack, it's taking something other people find useful and ruining it for everyone. Suppose you systematically stole all the toilet paper and paper towels from Starbucks bathrooms. To sell on eBay or whatever. Eventually they'd have to install pay toilets, hire washroom attendants, or just remove access entirely. One motivated jerk can easily make life a little less convenient for everybody in a great many ways, but that doesn't mean he should.