A Modicum of Mercy to the Neutral Evil
I feel that the centipedes I find in the outside world seem less deliberately offensive in their abhorrence. House centipedes seem nefarious in their abominable ugliness. The former seem to understand why they have to die. They know that I can't accept them at any point in my life, and they accept that fact to be a part of their own truncated lives. They've made peace with the situation that they've become through the sheer nature of their existence. House centipedes scurry around with baleful glares and a compact aura of palpable malice. If I had any extra zeal to give to their slaughter, they would receive it. They shall learn what comes to villains who twirl their moustaches so audaciously. They shall learn it through their stupid oozing backs.
Bonus Question!
Best alien worm beast? Hutts.