Yep they are, how is it cheating to tape something in public in front of 80,000 people? You Texans are generally smarter than this.
Simple. It is a game. The game has rules. The arbitor of the rules said the act violated the rules.
This is not a Constitutional issue here; stop trying to apply the Bill of Rights.
Texans understand the difference between being in a game and being on the street.