I agree that it is not necessary but I still seal the little bit of ammo that goes into my survival (possibles) kit when hunting out there a ways. I figure I've only got 1/2 dozen cartridges in there depending on what gun I'm packing so it isn't too much trouble. I'd feel pretty silly if I had to spend a night or three with a hungry tummy because I refused to take an unecessary step. On the other hand, I'll never feel silly about spending more time at the reloading bench.
Insanity: doing the same thing over and over again and expecting different results