In Australia, it isn't mandatory to endorse instructor trainees in full spin training, meaning that a lot of instructors aren't endorsed in full spins. When I did my instructor rating, I asked to be endorsed on full spins, however there wasn't (and still isn't) anyone qualified to endorse me, so I haven't got spin approval. This obviously means that my students don't get to experience full spins at all in their training (through no choice of my own) which is the way it is for a lot of students.
I firmly believe that full spins should be demonstrated at least once prior to a student being able to take passengers. There have been too many accidents as a result of low time private pilots doing low and slow manoevers and spinning it in. Had they witnessed one, they would have had a greater appreciation.