Maybe we have two completely different understandings of what a high school marching band is. I've always thought of high school marching bands as groups that actually compete with bands from other schools. I can't imagine that any high school band that allows adults would be able to do that.
With all due respect, this one just isn't worth fighting.
These people are trying to have their cake and eat it too
-- in other words, they're acting like liberals. It just trivializes our legitimate beefs with the public schools.