Liferay 4.3.1 introduced a new model that introduced much greater flexibility in the model of Organizations and Locations (see http://wiki.liferay.com/index.php/Hierarchical_Organizations for details).
Now the structure of most institutions can be modeled using only Organizations, while Locations are a plus for very complex institutions. The drawback of this is that the presence of Locations is confusing people who believe that using them is a must. Even if they know they should not use them, they are always present in several places of the administration UI cluttering the interface.
The solution is to create a new property that allows to optionally disable Locations from the UI.