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One could add:

The Barking Dog

Barks at everything all the time, people learn to ignore it. Then, when there's real danger, no one cares, providing literally no value and becoming only an annoyance.

It's kind of like a dual for the security guard one.

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I think the best known illustration for this concept is actually called "The boy who cried wolf"

Yes, but one important difference is that on OP's examples there is some sort of system that you put in place for a specific purpose, and it fails to do so in practice.

It would be akin to that lying boy being the officially appointed wolf-spotter for his village.

That's only true if the burglar knows that the owners ignore the dog's barking.

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