Upload & Sell: Off
I have season tickets, front row in the end zone.
I take a sigma 24-70 lens in and they check it every time.... so yes they do enforce it. I tend to leave the lens hood in the car as they might try to consider that part of the length.
The people at the security gates are trained to know how far up their hand 5" is, they all measure with their hand and if there are questions they call in someone else.
I guess I would recommend not risking it....