Giant scale aerobatics have taken over here in Houston. Some days the field has as many as a dozen huge aerobatic scale airplanes present and flying. As large as these airplanes are on the ground, they are often so high that I can barely see them. They are obviously over 400 ft high. The appear to be 1000 to 1500 ft high. Our club is within 3 miles of two private airports, possibly 3. Can our club loose its charter or get in trouble by ignoring the 400 ft rule ?