First is a subjective opinion that it would somehow be inappropriate for public lands in some unspecified ways. Second is an unsupported suggestion that it would lead to overuse and conflicts due to unlimited flights. But these views are totally unfounded as evidenced from the facts on participant attitudes, accident and insurance statistics, local weather statistics, actual site-use patterns, and topographic requirements. The use of hang gliders and paragliders is a not spectator activity. Foot-launch gliders are silent, small and inconspicuous at soaring altitudes.
Activities are sporadic due to extraordinary weather dependencies.
And sites are usually remote, accessible only on foot, and part of a natural topography that blends in with its surroundings. Like hiking and canoeing, it is an intensely personal way for participants to experience and enjoy the natural environment by their own unaided efforts albeit from a different three-dimensional perspective. Participants usually hike their equipment one-way along existing trails to a natural vista or overlook and quickly launch. Since landings usually aren't made on the vista itself, nothing is left behind. Non-participants or potential spectators in the vicinity of vistas are generally not even aware of glider activities.