There's a military version of the ad technology whereby voices are beamed right into the mark's head. LRAD (Long Range Acoustic Device) was designed for ship-to-ship communication. But rumors from Iraq are that some US forces are using the weapon to project an interpreter's voice into a target's head, speaking as if they were Allah or Mohammed. I do like the idea of realizing a giant warship is speaking to you, personally:
With LRAD, you just aim it at a member of the crew, and have an interpreter "speak" to the sailor. It was noted that the guy on the receiving end was sometimes terrified, even after he realized it was that large American destroyer that was talking to him. This apparently gave the army guys some ideas, for there are now rumors in Iraq of a devilish American weapon that makes people believe they are hearing voices in their heads...
It appears that some of the troops in Iraq are using "spoken" (as opposed to "screeching") LRAD to mess with enemy fighters. Islamic terrorists tend to be superstitious and, of course, very religious. LRAD can put the "word of God" into their heads. If God, in the form of a voice that only you can hear, tells you to surrender, or run away, what are you gonna do?
(via Signs of Witness)