“Magnetic interference with the brain can make it impossible to lie, and polygraphs and “truth serums” will soon be obsolete, say Estonian researchers.
http://www.mondo2000.com/2017/11/27/new-technology-forces-everyone-honest/
Of course, it will happen. Everything that can, does, with very minor exceptions - where are our jetpacks, our hoverboards? And when it does, like the self-driving cars that are tangling ethics professors in gordian knots, we'll need to be ready... the initial adopters (of magnetic screening devices, say) will have a definite, palpable advantage over the competition, especially when the Government start sending out truth waves...
We should start working on the ethical systems now...