The answer to that is the NFL is now in the business of selling see-thru bags with the team logos at all of their Fan Gear stores.
I give baseball 2 yrs. tops before they catch on and do likewise.
I have no problem with any entity, NFL included, in promoting their own merchandise. Even with giving fans with their see-though bags an express lane through security.
But the day they assume I'm a criminal because I'm carrying a fairly standard canvas bag instead is the day they no longer get my business.