I don't think prayer has a place at a public school football game, a moment of silence wouldn't bother me, but not a prayer of any type being played over the PA.
If you don't have prayer over the PA how is God supposed to hear it?
I have seen this sleight of hand many times. No one has the right to use public funds (like the funds used to buy the PA system, buy the bleachers, etc.) in order to broadcast sectarian prayers. No one is saying that people caught praying are going to be thrown out of the game. All that is being said is that they shouldn't use the PA system to say their prayers. Some people refuse to see the difference between the two.