When I cutted down a tree, one of the logs fell on the side of a cliff, first I thought that it was no problem, but later when I tried to build a fence, it was blocking my way, and I couldn't lift it because it lie on unpassable terrain... THE CLIFF.
Same problem with water, they fall into the water and you cant get it out. It just lies there being ugly.
So my idea was (pretty obvious, and I guess not so original) that logs can disappear after a week in real or something like that. So that when your trying to build a nicely looking town, those logs dont keep lieing there being ugly. It may not be a big idea, but it would get rid of alot of logs experience-cutters (or how you want to call that) created. Or just logs you cant reach at all...