Did you fab up the same pin/lock protection for the receiver on you truck?
No, but that's not a bad idea. The reason I haven't is because to make it work I would need to weld a similar sleeve to both sides of the receiver on the truck, making it so I could only ever use the Bolt lock. Thinking about it, that could work fine for what I use if for, as currently all of my receiver stuff uses a Bolt lock to secure.
As I said, I've used that Bolt lock approach on a few things. Here is a bolt which threads into my bike racks. Note it is a 5/8" Grade 8 bolt with a Bolt Lock "connector" welded to the top, which tightens the rack to the receiver securing it, stabilizing it, and making it rattle free.
You can't see it in this picture, but the collar has a bottom, so the bolt tightens it, and the insert, to the receiver. You install and tighten the bolt with a deep socket, and the Bolt lock eliminates access to the bolt when it is in place. I always thought this was pretty slick.
There is an extra measure of security to this approach. Even if you cut the bolt flush with the outside of the receiver, since it is threaded you can't easily remove the bolt, and what remains still keeps the insert from being removed from the receiver.
Here is another example. When I put a bike rack on the back of the Jeep, I need to use a receiver extender to clear the spare tire. Similar approach to the Bike rack example above. The extender is solid, and is threaded to accept a 5/8" bolt, making it secure, absolutely stable and rattle free. Again, the collar guards against access to the bolt when it is in place.
Extra points to anyone who can identify what was used to make this collar.