Excellent! Thanks for the article and pictures. I would love to have seen/heard one of those. I've been waiting for years for these to hit the mainstream. I first saw their stuff on the web back in (I'm guessing here) 2001. My reasons were not as jovial as the convention hall prank, though. My neighbor runs his hot tub 12 hours a day (2 hours on, 2 hours off, day and night), and it used to wake me up and keep me awake. So, instead of planning on how to erase his entire genetic line from our world, I turned to a Google search for "audio spotlight". BAM, there it was. I figured that I could team it up with a motion tracking, motorized panel and beam screaming noises (or worse) directly to his head as he walked around his yard.
I've gotten over it, though. Almost.