OK, here's a perfect example of people doing the exact opposite and having same results.
I storngly encourage people NOT to do behind the neck presses as they don't seem to work (in my opinion) that well at stimulating the shoulders, but more the traps - that's why people train traps with shoulders - because they don't know how to isolate the shoulders properly and they feel the pump in their traps, when the traps are actually a back muscle and should be trained as such.
I am a huge advocate of front standing millitary presses. I believe that if you can only do one exercise for shoulders, that should be it.
But as I said, look at BigKiwi and me. We believe the exact opposite, but look at his shoulders, and my shoulders if anyone can remember them from old photos, are just like his as well. 62" around. So, two different theories, same results.