How much is too much?

I have had a multitude of conversations regarding this topic. Of course it is going to vary from level to level. But how much offense is too much offense? In my opinion regardless of level I believe it comes down more to what the coach can teach. I mean lets be honest, have you tried to do your fifth graders math lately? Football isn't algebra. But it takes a good teacher. What do you guys think? Cmon...someone bite.