Perma clutter?

Congrats on the new forums!
This is more a question, but I am sure others wuill have suggestions based off it -- what happens to items that players place, then log off and never come back to the game again, ever? It seems that there could be a LOT of perma-clutter building up over time. I don't know a good solution for that, but it might be an issue best worked out in advance?
This is more a question, but I am sure others wuill have suggestions based off it -- what happens to items that players place, then log off and never come back to the game again, ever? It seems that there could be a LOT of perma-clutter building up over time. I don't know a good solution for that, but it might be an issue best worked out in advance?