>>That's what I thought, but then you may have had some really cool method of notifying the user. Personally, I'm trying to figure out how to instantiate a mallet class that will come out of the monitor and hit the user on the head.
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>I would like to see an electrified keyboard where wrong entries give progressively worse shocks.

I had a high school physics teacher who would hook wires to students chairs, the pencil sharpener...anything he could think of.