You know what, that card IDing idea is awesome. What sort if douchebag says 'you can't do that?' My reaction would be positive/excitement and a desire to contribute, but it seems there's just this large subset of people out there who react to every new suggestion with total stick-in-the-mud negativity. Like it's their natural, gut-instinct. Maybe they just never see ideas (like the card reader) as these wonderful elegant things, or they can't imagine enough about the rest of the problem domain to see it's potential value, who knows.

At my first job my whole team had to enter details on a shared spreadsheet. I suggested we set up data-validation or drop down menus for input, someone straight off said 'can't be done - someone tried it last year, didn't work.' then took me like two weeks of campaigning just to overcome this initial knock back. What a waste of time.