This 'split rim horror' is a little out of whack in my eye. These rims have been around since you know who was a kid! They were mounted by experienced men with the proper tools and know how. The certainly won't reach out and kill the nearest person walking by.
I would be willing to bet that if you deflated them that you probably couldn't dissemble them yourself even if you tried.
Millions of trucks have driven billions of miles on this style rim, and while they take special precautions to inflate, they aren't a time bomb waiting to get you.
Stuart