Would replays in ball parks cause riots?

Ever notice how people, especially baseball people like fans, just make silly reasons to oppose ideas which they fear but cannot rationally oppose.

One of the reasons I hear to oppose my idea that the TV broadcast should be silently played on the big screen that each park contains is that fans will become so incensed about an umpire's decision with which they disagree that the fans will riot, break into uncontrolled violence.  The fact that here in the good old USA, despite our faults, we almost never seem to riot at our sporting events.  After all we freed ourselves from the British 231 years ago just we would not be tempted to riot at soccer games.

During an NFL exhibition game yesterday announcers mentioned that for the 2012 regular season  replays seen by officials during a review would be played on the big screen in the stadium so that attending fans would see what the officials see simultaneously.

Apparently, no fear of a riot.