Silenced Sirens: Science Fiction

The sirens sung their song of warning when the first intruder entered the solar system, but the ears that had been told to hear, to listen, to always go when the sirens called, those ears had stopped their hearing with wax plugs. It was the sirens own fault. Over the years, they had become bored. The centuries and then the millennia wore on, but still they were never allowed to have visitors. Their duty was merely to wait, chained to the rocks, listening for intruders. At first, it made them focus more intently upon their duties, but even that waned when there were no intruders. They took bets among themselves as to what the first peril to make them sound their call would be. An asteroid--

Inspiration: "siren" - the dual meanings in the dictionary
Story Potential: Medium, I suppose. We'll see if it comes back to haunt me.
Notes: I kinda like the idea of teching up the mythology and giving it a solid use.