glider/airplane collision

In article ,
Shaber CJ wrote:
The creation of an aerobatic box is not some type of
shield that will protect your aircraft. Only your eyes and your
actions can do that.

Dear Airmen/Airwomen:

There are no guarantees even when we have procedures in effect (aerobatic box).
That is the lesson to be learned. My heart goes out to the family and friends
of these Airmen, what a tragedy.

One of the newspaper articles said the wreckage was within a few
hundred feet of the airport. Is this true? Does this mean the
aerobatic box is within the traffic pattern of the airport?
And it is a private airport?

The NTSB report seemed to indicate that the PIC for each
flight was flying from the rear seat (including the rear seat of
a high-wing Piper Cub). Is this the understanding
of others as well?

Yesterday I flew a glider solo around our local, private
gliderport, and there was a cropduster doing his dusting
very nearby. I lost sight of him a few times, and it got
me more nervous than usual (mostly because of this thread).
I actually had a low level 1 knot thermal at one point,
but came back and landed instead (after a LOT of S-turning).

I fly a high-wing airplane with bad visibility into our
private airport a lot, and we do training (including simulated
airbrakes stuck open) frequently there. As I think about it,
situations similar to this thread happen at my gliderport evey
week. This is really making me think hard...

What a rotten bit of luck...