It was pretty funny until they started messing with the presentations. Turning off a wall of LCD screens is okay in my opinion (maybe not so much at something like CES, but like Best Buy), messing with someones presentation that they undoubtedly worked hard on is not cool or funny one bit.
Egos isn't the only thing that could of been hurt here, btw. CES isn't some little get together of uber dorks, its a big time event. It's not even open to the general public. Also, being such as what it is as well as being closed to the public, they shouldn't have to think of something so ridiculous as someone going around turning off all the monitors and presentation screens with a click of a button from a little device that, as far as I know, you can't even get at your local gag shop.
That said, what a great little device! lol I would love to have one of these babies to screw around with my friends or local electronic stores that tick me off from time to time. Your rebate only works online?? Well take this! *click click* muahahaha