where theres the know how to make a legal board, theres also the knowhow to make an illegal board... imagine if all cheater boards were scrapped and burned... there would be an opening in the market for cheater boards, and some lucky person would make a mint.
if you had a scanner thing (which i was considering) why not just chop off the bar code, or detectable part and stick it on a cheater board?
a degree in electronical engineering would no doubt be enough to draw up plans to manufacture one.
so to me it seems that the best solution (like i think it was craig said) is to have half of your grip off, ready for the ref to check it when it gets chrono'd, and then its sealed for the day.
still, as the refs get smarter, so will the cheats, some will always slip through the net