One practical difference is that you can make dollar bill detection relatively robust. Sure, you could cut it into 4 pieces and scan them separately, but you'd still get stuck when it comes time to print them. There are only finitely many dollar bill shapes. But there are infinitely many plausible gun components, and infinitely more ways to divide them into sub-assemblies.

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jolmg 3 days ago | parent | next [-]

> but you'd still get stuck when it comes time to print them.

It also seems a lot harder to DIY an inkjet or laser printer. The parts needed to DIY a 3d printer are a lot simpler.

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EvanAnderson 3 days ago | parent | prev [-]

It would be interesting to test what the minimum detectable piece of US currency is. (I wouldn't want to do it on a network-connected system, though.)

	▲	NoMoreNicksLeft 3 days ago \| parent [-]
		There is a pattern of yellow dots on the currency. I do not know at what size they tile across the paper, but the piece of currency would have to be smaller than that, most likely. Far easier to dump the firmware and NOOP out that algo.