Yeah, but hexi-telly gets more viewers.
There was a problem with similar brain cooking type death rays in Cuba a while back. "Diplomats" at the American embassy were complaining of headaches and nausea.
In the UK back in the 80's someone was trying to sell lightpulse "weapons" to the police and military for crowd control. A bit like the disclaimer "there is flash photography in this report", the thing looked like one of those large torches people stick in the boot of their car, one with the pistol type handle except the torch/light part was bigger. Apparently the strobe unit had been tuned to deliver the range and speed of flashes to make people feel sick. I never saw one in service.
There was also test of some widget that emitted a certain frequency/pitch which is only heard by yoof's. As we age we start to loose our range of hearing so the particular frequency was out of the range of people around about their mid-20's and older. To a yoof though the dog whistle like frequency/pitch was particularly annoying so they move away from it. I know they were testing it in areas around shops prone to gathering yoofs and vandalism in my police force area when I left. By all accounts it worked a treat, but I don't know if it was picked up and implemented.
Line whistle from the LOPT on old CRT televisions used tp convince many a kid that they were having auditory hallucinations or alternative thar their parents had gone deaf.