Stall/Spin training is a very useful tool to learn about the airplane limitations and to recover if you spin. Unfortunately spin training is only mandatory for flight instructor applicants. I think it would benefit the dropzone if the pilot is familiar with stall/spin procedures. However who would pay for it?
After a recent conversation I've learned that insurance companies may now be demanding a spin endorsement even for 182s. The DZs may handle it by demanding the applicant have it already or agree to pay for it as a cost of doing business. Or maybe something in between. But it seems industry is taking it seriously and recognizing a glaring deficiency in some pilot's training background. It's good loss prevention training.