I find this equally as scary as getting whacked by the auto ratchet, if not maybe more. I do have my handle pinned, and unpin it often to use the handle as a lever (super handy). But the thought of the handle flying 40' will keep me pinning it back when in use.
Or.......
Think it through and pull the "un-pinned" handle out while you are not using it. Lay it down next to the jack, insert when you need it, it's not 40' away and not going into free walking mode. Oohh, another option, use a couple pieces of self adhesive velcro on the handle and a jack frame, cut a velcro wrap piece and use that as a strap to hold the handle from contributing to problem. The velcro will give when force is applied if needed in a hurry but not give way to ratchet action.
It's ok to fear hi-lift jacks, but don't fear common sense. If one fears the use of common sense, nothing gets done, best not travel alone. If one fears the hi-lift jack, the likely outcome is respect and knowledge of it's workings.
The truth is lack of common sense and knowledge of an item is the real danger. If you read the internet on how to use a hi-lift, your probably scared. Read the manual and use the jack before you need it (Practice??), your probably going to have success.
I have an unbelievable fear of guns!! Point a gun at me and I'll likely wet my pants and run. It's the business end of the barrel were the bullet exits that scares me, not holding it and pulling the trigger in a safe direction. I think it is the same kind of "liberal" painted fear a lot of people have these days, I am not speaking politically either. I'm talking the liberal application of fear based thinking.
WSS