wrog

Re pencils:
I'm not sure they work all that hard on getting pencils to be actually hexagonal -- I seem to recall seeing lots of pencils with alternating flat and rounded sides. (I also seem to use far fewer pencils these days; pen seems to be just fine if I don't have an emacs buffer in front of me...)

Re jiggered dice:
That's why having these things mass-produced would be a big win (i.e., if one can get the mass-producers to adopt the right labelling...).

One can also reduce the efficacy of loaded dice by getting people to call it in the air ("Andy, roll the die; Bob, pick a color; Carol, pick clockwise or counterclockwise;...")

Which then leads to the various rock-paper-scissors style games where you don't need any randomization device at all