I know the guy was 300 feet away but that chain link fence idea isn't bad. We always here "oh no some yahoo might fly into the pits" anyway.

At almost every club I see in my area there's...

1. a covered pit area (tarp or wood structure). People will leave if they can't find a spot in the shade.
2. a 3-4 foot high chain link fence all the way around the back of the pits to keep spectators out.
3. an 8+ foot chain link fence around the entire parking lot to keep everybody out when no members are present.

How frinken hard would it be to put a fence at the front edge and ends of the pits. God forbid anybody want to walk out into the sun anyway if not flying. We can keep spectators out, we can keep the sun out, but we can't keep planes out (crashing into the pits).