This type of thing was also commonly done in hardware back in the day. For example, DEC VAX microprocessors sometimes had etchings that taunted Soviets reverse

This type of thing was also commonly done in hardware back in the day. For example, DEC VAX microprocessors sometimes had etchings that taunted Soviets reverse-engineering their technology (src: http://micro.magnet.fsu.edu/creatures/pages/russians.html http://micro.magnet.fsu.edu/creatures/pages/russians.html ).