Presbyterians.
I don’t know about enslaved, they’d most likely just eat their faces off and then have sex with one of the orifices in the skull.
Alas no: malaria is spread by one genus of mosquitoes, or rather 30-40 species within that genus (which has around 430 species in total). Cite.
…aaaaand the thread is won by snowthx. Kudos. Incidentally, the Carter Center has been working hard since the 1980s to bring about the OP’s scenario.
Kangaroos.
I mean there has to be a reason why they exist on only one continent. If it wasnt for the pouch, which makes them unique, why would we keep them around?
Seriously, Australians out there? What place do they serve in the ecosystem?
Thanks, and darn.
Those bugs that crawl on you after you drink too much.
Hookers?
The multicolored Asian lady beetle. I hate these things. They attack our house in the summer and thousands get inside. It’s now almost February, and they’re still in our house. :mad: We’re constantly cleaning them up with the vacuum cleaner.
From what I’ve read, these things were purposely introduced by soybean farmers.
I’m not Aussie but the was it was explained to me is they are basically deer and serve the same purpose.
My choice would be the honey bee. If we’re trying to fuck up the world by eradicating something let’s got big and see just how much damage we can do.
Bed bugs.
I don’t care if it turns out those suckers are secretly the backbone of the eco system, they have to go.
If the world ends…
At least I outlived those bastards.
Wow.
My religious beliefs prevent me from nominating a species for extinction, sadly.
I think you guys are a little hard on hematophagic parasites. It’s not like they farm you and then cut your heads off. Fleas can be a pain. But most mosquitoes (especially in temperate zones) aren’t that much of a disease vector, and they’d be relatively easy to control if you didn’t keep building on swampland.
:d&r:
cats.
they are just so mean.
and flying squirrels that live in peoples houses walls and ceilings because i hate you so much.
What possible harm would extincting all mosquitoes cause?
They’re actually a pretty important part of the food chain.
This remains one of the better answers - a single species, Cimex lectularius, is the culprit for most humans ( minus over-adventurous biologists that might get bit by a non-human specific species ) and they are a tough and difficult to eradicate pest. However they’re only a nasty pest - they don’t spread disease as far anyone has been able to determine and despite their recent resurgence they’re avoidable with some diligence.
What you ideally want is ONE species that is a.) human specific or at least very happily preys on humans and b.) is major transmitter of disease or at least more persistent misery than a bed bug. In days past the body louse ( Pediculus humanus ) would be an easy choice - it killed millions by spreading epidemic typhus, especially during wartime as well as relapsing fever and trench fever. Said diseases are less of a threat today, but still are around and killing. I think I’d still pick this one. It’s human specific and no one will miss the little fucker.
I think the cat flea ( Ctenocephalides felis ) might be my second choice. No, they aren’t the one that usually spreads plague. But they can transmit tapeworms and stuff like murine typhus, unlike bed bugs. But mostly they are the most ubiquitous pest of people and their favorite pets in the world. Far more common on dogs worldwide than dog fleas and perfectly happy to harass humans. Wouldn’t get rid of all fleas - dog fleas and nasty critters like the oriental rat flea ( the primary plague-carrier ) would still be around, but it would get rid of the a nice big chunk of the flea biomass.
If you want to tackle malaria and you want to cheat a bit the Anopheles gambiae complex of seven species are virtually indistinguishable and if you get could them all ( by claiming you’re a “lumper” - just go pure physical trait phenetics as your taxonomic philosophy 
) you’d eliminate the biggest single source of misery in central Africa. It’s not going to help in other areas, but it still would do a nice job in cutting falciparum malaria back there.
Stink Bugs. Sorry I don’t know the official name for them. I don’t know how widespread they are but here in western PA they have become a plague the last few years. They’re everywhere, no matter how you seal your doors and windows you still find them in your house. And you have to be careful when you kill them, because of the powerful odor that gives them their nickname.
Politics - from the Greek Poly meaning many, and Ticks meaning little mindless Bloodsucking creatures.
European starling or alternately, house sparrows.
Eff you, rat-birds.
Cane Toads. Horrible, useless beasts.
If you’re going to suggest animals we’re already trying to eradicate, there’s the screwworm fly. It’s been eradicated in the US and pretty much all of Central America and some (most?) of the Caribbean. Still endemic in South America. Also in parts of Asia, although that’s a different species.