Wife's best friend got married on the mizzou game of Snyder's first retirement. I sold my tickets - as my wife was 7 months pregnant and I had to go. Last minute, they asked me to video tape their wedding... I'm not a videographer, so I wasn't going to be able to do a great job anyway - so it was no big deal that during quiet times of the ceremony, you can hear stan webber on their wedding tape through my ear-bud. Groom & groomsman were all KSU fans, so I think they thought it was pretty bad ass.
FWIW - If I were you, I would totally and openly listen and/or watch the game during the wedding. If they'd had smart phones with streaming video at the time of my wife's friends wedding, you sure as hell better believe I would have been watching it that day.