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What an exciting and innovative idea, you would exclaim to yourself, and to those around you, as you jumped for joy, reveling in your own brilliance.
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Sorry to disappoint you, but don't bother. IBM has patented that: 7506303. The lesson learned? Just because something is simple and obvious doesn't mean you can't patent it. So run, don't walk, to your nearest patent lawyer, turn your obvious ideas into incomprehensible legal babel, file a claim, and then sue someone's assets right off their balance sheet, perhaps with the help of a patent troll. Surely such patented ridiculousness serves primarily to suck the lifeblood of the software sector much like collateralized debt objects did the vital stuff of the financial sector.