The thing with feeding truly random numbers to a person is that they never seem "random enough," so you'll have people rejecting a stochastic process because they see patterns, so they'll go out of their way to make it look more like noise, and decreasing the entropy.
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With a Lava Lamp:
http://www.lavarnd.org/
Or with alpha-decay:
http://www.freepatentsonline.com/6745217.html
Either of those work well 200 years ago? I didn't think so.
The thing with feeding truly random numbers to a person is that they never seem "random enough," so you'll have people rejecting a stochastic process because they see patterns, so they'll go out of their way to make it look more like noise, and decreasing the entropy.
"Here be chaotic bits"
I love the idea of this. Commodity hardware + smarts = awesome