Here in Australia, for instance, we have a wretched little (introduced) animal called the cane toad. If a virus like this could be engineered such that it would kill them all out, I'd say it's not such a bad thing.

I am so happy to hear this, there is such huge problem of runaway mice around here!

Next project: Create virus to kill all morons

Lab Dude "so we want to you to go in that room while we seal you in and then just open up that little vial on the workbench in there, OK?"

Guinea Pig "sure, do I get paid now or after"

Lab Manager "oh .. definitely after!"

For decimating our pigeon population, and making Springfield a less oppressive place to while away our worthless lives, I present you with this scented candle.

% Away from the speech, Skinner and Lisa talk.

Skinner: Well, I was wrong. The lizards are a godsend.
Lisa: But isn't that a bit short-sighted? What happens when we're overrun by lizards?
Skinner: No problem. We simply release wave after wave of Chinese needle snakes. They'll wipe out the lizards.
Lisa: But aren't the snakes even worse?
Skinner: Yes, but we're prepared for that. We've lined up a fabulous type of gorilla that thrives on snake meat.
Lisa: But then we're stuck with gorillas!
Skinner: No, that's the beautiful part. When wintertime rolls around, the gorillas simply freeze to death.