What makes you think that being around for decades makes it impervious to being hacked? You're on hackernews.

Because trucking isn't Uber. The company that is shipping out million-dollar medical automation robots calls the same trucking company every day. If they ever found out that the sensors had been tampered with, and it would be obvious right away, then the robot people would never hire those truckers again. That's your reputation. In real life, that's how people do business. The real world is not a big puzzle.

Exactly this. Not to mention shippers often apply two sets of these, one on the outside for deterrent purposes and a second set inside the equipment that they'll verify before signing off that it was received.

I agree. But the situation you describe does not address possible weaknesses in the sticker design.

If the shipper doesn't want to have to deal with it, a pinhole with some cyanoacrylate will keep the ball in place, and will be very difficult to notice. Resetting it after a tilt will be much more challenging.

That's a dangerous game. Even if the receiver doesn't notice at inspection time, they might discover it after delivery. They could notice the balls don't move while breaking apart the box. Or, the expensive object they received might exhibit damage characteristic of being tilted. At that point it may be too late to prove the shipper did it, but they'll definitely re-inspect the tilt-detector.

If you're lucky, they'll never hire you again. If you're unlucky, they'll rehire you just to prove you defrauded them.