I know in the 80's they'd have anoying arial banners being towed by aircraft flying over the world all the time, they even had an ultralight show over epcot and world showcase lake area during the afternoon.....( trip was late dec 1986. OU apprearance for the orange bowl, beat penn state.)
its deffinatly been a no fly zone since 9/11 but dont know if it had been prior.
DVK