It is not (B) responsibility to make sure he doesnt get shot down, how could he - he is flying.
Personally I wouldn't fly a 10k dollar plane on, or around, a club that is full of newbies who don't know any better. The choice is yours, and as far as the payment for the plane , I would like to see you try to get 10K out of a 10 year old kid who can't legally work in the United States.
Just use common sense and this should never happen.