Neither have I. I've seen some creative use of the garbage in some towns, though - wish we could put it in inventory until we figured a good use for it. (Sorry, hoarder...)
I have kept garbage in three places: nuclear waste and barrels around the power plant, and empty kegs/bottles around Duff Brewery and Cletus' farm. I've also hidden 15-20 pieces of garbage behind other buildings in my town, mainly due to the fact that once they are cleaned up, they're gone forever - so why not just hide them if possible in case a use can be found for them later on.
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I like the white barrels... I kept about 20-30 to decorate my power plant.
I tried that too
Too bad we can't. The developers probably never considered people using it for decorations.
Why isn't it?
THIS. :!:
Homer and Lisa both have a task to clean up Springfield. If there is debris to clear it will appear at the top of their lists. :-)