When was the last time a fan went to a football game under a contract other than the one preprinted onto the ticket stock? If the answer is "never", then the terms are most definitely not negotiated.
You’re missing the point that the ‘negotiation’ occurs when you buy the ticket or don’t buy the ticket. It’s up to you, the terms are clear, and you could go spend your time on something else without those damn football teams interfering with your life at all.