The justification for these rules was summed up thusly:
The owners can do that for a simple reason: They’re owners. “It’s our facility,” says Karl Swanson, spokesman for the Washington Redskins, a team viewed by the press as particularly hard-line on this issue.
Karl Swanson may have a point as it relates to his employer's FedEx Field, which was (mostly) privately funded, but the vast majority of arenas, ballparks, and stadiums are not. As such, it strikes me that teams should be cautious before going Big Brother on the local media, lest some local politician decide to take the position that the tax dollars being used to subsidize these facilities entitle them to a bit more oversight than was originally anticipated.