That's not how they think.

When it's a numbers game, just get rid of all the ones that fall into the trap.

You can worry about the others later -- the feral ones hiding in the forest -- if your kill number is still too low.

Why work harder than you have to?

BTW, maybe it won't be a new bug. Maybe it will be a frequency that activates the self-assembling nanocircuitry some theorize has been implanted.

That would be EASY to make happen.