It should come as no surprise that this occurred at the hastily-scheduled game against the Saints in the aftermath of Katrina, since this was considered a "home game" for the Saints and many of these tickets were sold to outsiders who would never have a chance to buy them otherwise.
There was a similar "civil rights" incident a few years back when someone paid an airplane banner advertising company to fly around over Giants Stadium with some kind of controversial banner (maybe it was for an abortion clinic or something) -- just to make a public statement. The stadium authorities tried to quash the plan on the grounds that the message was somehow "not acceptable" to the fan base, and the group who purchased the ad may have even gone to court and won a case. And yet for some reason the story disappeared from the news and the banner was never flown over the stadium.
Giants Stadium ping.