rminsk,

Call park security. This moron is endangering other park users. He obviously won't listen to reason, so maybe he'll listen to muscle. But be sure it's legal muscle - not yours. Anything you do to him or his plane leaves you open to a lawsuit.

I fly in a national park. The guys who regularly fly there are of a like mind when it comes to preserving our ability to use the site. We're careful to avoid other people, and try to cooperate with the hang gliders and parasailers. Some days that means not flying if the place is too crowded. Just in case we get morons like the one you ran into, I also carry my cell phone and I know the number of the ranger station.

Sometimes you have to work to preserve a good flying site. Good luck.

papermache