Engadget ran a story today entitled "US Army to arm UAVs with xenon-based paralysis inducer". The article describes that technology as a "non-lethal crowd-control device".
Wikipedia's entry for Schwa describes it as the "underground conceptual artwork" of Bill Barker. A true original among the popular alien image fetish / conspiracy theory "parody" themes of the 1990s. One of Bill's original serigraphs for Schwa hangs on my wall. We had lots of fun working with Bill at FringeWare, especially for the cover of FWR #5. That issue was our first to sell through completely, though I've stashed away a box or two for posterity.
Bill's first pitch to me about Schwa was that it was a government conspiracy for alien UFOs to use Xenon-based technology for non-lethal crowd control. In other words mass media brainwashing. Holy shit! Apparently somebody at DARPA was actually listening to us back in the 1990s. Either that, or Bill knew more back then than he could ever say in words. I'd bank on the latter.
BTW, Wikipedia states that Bill has been "MIA" since 2001. I've talked with him since then. More like doing fine while avoiding the paparazzi.