WiebeTech sells a bunch of interesting computer forensics hardware. I’m guessing these are typically used by law enforcement when seizing unlocked computers to keep them unlocked.
And that's the horrific part to me. Instead of making sane software or sane policies, it ends up making perfect sense, at least at an individual's level, to manufacture a piece of specialist hardware that does nothing but jiggle a mouse.
One of the use-cases of the jiggler is during police raids, where they're used to keep a computer from locking itself. Obviously that's not the use-case you're imagining!