A friend of mine is a consulting engineer who often serves as an expert witness for the defense (bicycle mfg's) in product liability cases. An enormous majority of those cases are quick-release related. Methinks that manufacturers of most inexpensive (sub-$500) bikes, and all bikes sold in department stores, should have nutted axles. Most buyers of cheap bikes don't know, don't learn, and don't want to learn enough about them to use a quick release safely. In the 1970's, Schwinn changed a couple of models from QR to nutted axles when their customer data revealed that the average buyer of a Continental was 12 years old. If manufacturers can't let go of this minor bell-and-whistle, they'll find the government doing it for them--and for all the rest of us! Bootleg quick releases from Canada, anyone?