That's always been my take. With all the high tech cameras around today, with all the cameras around football stadiums on game day, and with 60,000 people in the place, how on earth could you ever hope to ban any sort of recording of events on the field? Why would you even try. Seems like the Pat's mistake was filming from the side line, instead of from the big hair of some woman in the cheap seats.
Recording another team's pre Super Bowl walk-through on the other hand, is a whole different matter.
I don’t even see the big deal about the walk thru. Most final walk thrus are in street clothes and primarily discuss the pre-game schedule, which is a matter of public record by Saturday anyway.