The inspiration of this is various garbage-centered characters in sci-fi comics (there's one in the movie Labyrinth as well), plus the desire to make one game tactiv more role-playish.
Problem I:
I usually use caravans as garbage dumps - it's the easiest way to get rid of the rubbish like xsockx that pile up, and because of FPS I want rid of items I don't need.
It feels weird to me that a trader caravan come, and they will always accept a "gift" of a lot of worn down clothes, invader junk you don't want and so on. I feel like, they should be inclined to say no to worthless things. And also that destroyed socks and thongs should have a trade value of 0. So, IT DETRACTS FROM ROLEPLAYING and feeling like you're in a coherent world that you hand over your garbage to traders.
Problem II:
Garbage disposal is, to me, a tedious problem. I like that the game has some of it, but I think that for the offered entertainment of it, it takes too much space in the game to get rid of random animal corpses outside and such.
Problem III:
Atom smashers are used in the game, because it simply is the best solution. It also detracts from roleplaying though.
I think therefore, it would be better to simply introduce a garbage collector function in the game that also worked as an element of a fantasy world.
So I'd say the kobolds have a strange cult centered around the collection and worship or garbage, which they collect from the entire world and then dump in a large pile that they dance around and worship, and the bigger their pile is, the happier their god is. So they send out caravans that don't sell anything, but just offers to the player to donate junk to it. And then you give them the stuff, and everybody's happy!
As they can't talk, the screens should just be like "A kobold caravan arrive. Their diplomat ask "UMUNUMUNUNU! NUGUMUNU!". Do you accept yes/no."
So there'd be a challenge there to figure out what they are asking, plus it would be fun to sometimes get incomprehensible messages.
They should get angry and leave if you offered them valuable items. "Like, are you trying to make us commit blasphemy or what???"
It would be very cool if they helped themselves with collecting the items, to relieve the workload and get it done faster.
I'd like if there was a downside to it - like the more you donated to them, the more likely it would be they'd send thieves or invadors, because they consider you rich. Other civs might also respond negatively in you helping the kobold garbage god cult.
I don't care that much if the garbage collecters are kobolds or another race, I just think kobolds seem to fit the role well.
I think most players would enjoy a lot some help with the garbage situation, and solve it in a more funny way than have to select d on a lot of individual items and them pull the atom smasher lever.
I think also down the road, when trade and economy gets "realistic", it probably can't work to make caravans take a large number of junk items. If you simulated the traders more realistically, they'd not want to devote their time to hauling broken socks around the continent.
It could be expanded to necromancers sending caravans to ask if you would donate the content of all your refuse piles and if they can collect the corpses lying around. Seems like a lot of opportunities for having that backfire, but many players would love somebody else cleaning up the battlefield and just truck the corpses away.