Because it is the closing of a traditional event for all and not just the ones "that can pay" even for the privilege to be under coverage for weather, easier entering to dancing, etc. It is like the scam where a dollar is charged to your credit card to see if you are watching your finances. If you don't question it then in the future you will be charged for a lot of things. This is like that in that if you don't question the practice you can count on more things having charges, (e.g. cover charges, charges for access, charges to attend or be a VIP for portions of the event, etc. etc.)
We will not be apart of that attempt of charging for extra bags, but feel for the people on the outside looking in.