Although I generally agree that a 70-200 in the hands of most of us is more an annoyance to other fans than a threat to the "brand", exactly what right do you claim here? I'm sorta tired with the overuse of that word.
Last time I checked, the ballpark is a private venue, the exhibition is presented by private entities, and just as with any other property, the rights are in the property owner's hands here. Let's not confuse private with public, please.
Your ticket is a license to observe, period, subject to the terms of the property owner, and revocable at any time. It is their right to be twunts about it. It is not your right to exceed the terms of the license.
I don't mean to pick on you specifically here, I just see that term badly abused all over the Forums and elsewhere.