Is there a way for labels to be displayed in KML only when zoomed in (or out) beyond a certain scale range, just as it is possible in ArcGIS? If exporting to KML from ArcGIS, I guess the first step is to label the features before exporting (correct me if I'm wrong). How does one set a scale range for a KML file?
I think the closest thing to scale dependent layers in KML is Regions.
However, Layer To KML does not write them and I do not think they would support the concept of scale dependent labels. There is a document on KML support in ArcGIS that mentions that regions are not written.