I am of the mindset that I am not going to change my behavior when I am not doing anything wrong. I do not believe it is unreasonable for people to behave like civilized human beings in any public setting, including sporting events. There have been several instances in the past (and I am sure plenty more in the future) where I have asked people to refrain from behaving inappropriately. The majority of the time, just asking someone to stop does the trick. On a few occasions, I have asked stadium officials to ask the person to stop. It is not something I like to do, but, like I said, I am not doing to feel ashamed for doing the right thing.