What possible "manufacturing standard" could fix that method of injury you quoted? "According to the American Association of Orthopedic Surgeons (AAOS), 246,87

What possible "manufacturing standard" could fix that method of injury you quoted? "According to the American Association of Orthopedic Surgeons (AAOS), 246,875 medically treated trampoline injuries occur annually in the U.S." If kids want to jump, get them a safe inflatable castle and let them jump inside. Those don't suffer from the trampoline problem you delineated, and frankly are more fun. The real problem is finding alternatives for things like stairs and bathtubs.