The picture of the log in the bucket is an example of how many farmers get crushed and/or killed moving big round bales of hay. If that loader gets very high and then the bucket gets rolled back to keep it in there, then the tractor gets off balanced or a low spot, and the thing comes rolling down on the steering wheel. A counter weight would also be beneficial for safety.
AND if you don't think it could happen to you...think again.
Some years ago I was using my loader with some kind of contraption I made to hold bundles of shingles, that I was lifting up on a first floor roof over my back porch deck, which at the time was just dirt under the roof.
Well, I was jerky with the loader, and a 90 pound bundle of shingles bounced up, fell back, slid down my loader arms, and it could have been bad.
Fortunately, I had made a guard that covered the hood on my B2910, and further had made a protector that kind of mimics a canopy, that has two upright supports on the front. So the bundle slid down the loader arms, hit the hood guard, and was stopped by the front upright supports of the head guard.
You can actually see what I am talking about, as far as tractor modifications, in the photo that shows to the left of the post.
Without my additions, there would have been expensive damage to the tractor dash assembly, and hood, and maybe the steering wheel hardware as well. Not counting me perhaps!
Point being, take D2Cat's warning seriously. "It will never happen to me" actually does happen to people.
Edit: Jeremy, I see you were typing the same time I was. And that you realize the dangers. One thing good about chains is they hold the item in the bucket, so you do not have to carry the bucket so high to keep the item from falling out.
When you get to where you are going, you can lower the bucket and curl it to loosen tension on the chains for removal.