I have a fix to the saddle bag theft problem and it should be available for purchase before the end of the year, and you will be able to keep your original quick removal hardware. You will not even notice it until you try and steel the saddle bags.
I understand the theft issue and that's important. I also understand that a bag can just fall off while riding; that happened to me.
So some type of cover over the back side of the 1/4 turn pins to protect from screwdrivers or needlenose pliers is a good thing, it alone does not cover you with the bags just falling off.
I had cleaned my bike on Friday evening preparing for a lot of riding that weekend; wife going to be at the Lake of the Ozarks with girlfriends for the weekend. In the summer I take the bags off about once a week for cleaning. I know how to twist the 1/4 turn pins till they lock, but that did NOT help as I lost my left side bag and didn't even know it. I found the bag, but not without having to replace the bag from scratches etc. Insurance covered it, but it was a $1,750 bill for them and minus my deductable.
The spring steel slide in nuts that Brukus uses are not a special part and are probably available at any auto parts store for a couple bucks. But they put the "kit" together and they sell security and convenience for us if we're so inclined to buy their kit. It's a 10 minute install at worst.
With that being said, I've procrastinated for a couple years now and have the slide in nuts in my parts bin and I have standard bolts, but I've just not take the time to do the conversion. I will do it before next riding season though.
I guess my point is that anything that keeps your bags on is a good thing and something to keep the 1/4 turn pins from being manually manipulated from the rear will be a plus, but there are still some of us that have just flat out lost bags from the 1/4 turn pins working loose over continued bumpy roads.
So when available I'm sure you're going to share your device with us. But keep the 1/4 turn HD pins in mind and they are not 100% safe for the bags.