I think we should implement the quality system for buildings too. Quality of buildings should determine how much it will last once the claim is gone and start to take decay hits.
This would help to keep the world clean and more appealing while most of the craps that noobs build around will decay much faster than big and huge villages/realms where people putted a lot of effort in it.
A quality 1-10 house will take fewer dacay hits before it's gone than a quality 100 house and so on.
Of course this could be extended at any buiding in the game at will.