?

In a sportsmanship email I received from the MSU Athletic Department today it quotes the following statistic: 89% of MSU fans in the stands think it is acceptable for fans to yell or chant loudly to make it difficult for the opposing team to communicate. Sure, of course. So what the heck is wrong with that other 11%? Did they not return the survey? Are there actually fans that think you should stay quiet for the opposing team?