Mikl-Em and I have been kicking this around and trying to convince Jim that it's worth doing and totally legal. (Which it is). Basically, you record the audio stream (the main hecklers, and any ambient peanut gallery) and you offer it as a pod cast. You come up with some clever, repeatable, hight distiguishable sound that lets the podcastees know when to hit play on their DVDs. Similar to starting DarkSide of the Moon when the MGM Lion roars at the beginning of the Wizard of Oz.

No worries about copyright, as you aren't rebroadcasting or redistributing the original film in any way.

Perhaps one of our happy bullhorn toting cacophonists could just yell, "press play NOW, Loser!"

This could also be done with a live feed, again only need a sync point for the home audience.