I think that whether you do that is up to you… it also depends on the globalizing that you’re talking about.
Do you mean add music of the same genre from different countries or are you talking about different genres from different countries?
The one thing that you might want to watch out for is creating a collection of tracks that becomes so large that it’s hard to manage as well as becoming so diverse it becomes difficult to hold the continuity while mixing sets. I’ve learned from experience that jumping around style wise in a set you can lose folks if things start getting too random.