I think you are missing the point. The question is what would one do if the building fell into disrepair and no one wanted to pay to maintain it. See Detroit for an example of this happening to houses.
Here is a more likely outcome: http://www.gadling.com/2011/03/08/abandoned-caracas-skyscrap...
Note the case of the Ryugyong Hotel, demonstrating that such buildings can be abandoned for long amounts of time without anything needing to be done to them.