XML : Is there a way hide database's map data when displaying entire map to a user

I am building a website that allows users to find locations and areas around the world based on data other users will be allowed to submit. I have a database containing all of the location data, latitudes and longitudes. I have implemented the Google Maps Javascript API, as well as the Static API for simple things in the website. What I would like to do is allow users to view all of the database's map points on a world map for the user to drag and zoom to the different areas to view and select a pin for more information about that location.

There is an example on Google's site that shows how to do something like this here. But what if I'd like to hide this data from the client, rather than passing to them an entire XML file with all locations?

I supposed what I would like to do is make it more difficult for someone to intercept all of the coordinates and save them to their computer. This might be a subjective question because of my novice understanding of this and I understand it is probably a trade-off type situation.