Is it okay to store the appSecret in the application's config which is visible to everyone?
Additional Info:
In the article
Build a “To Do” Application with Sencha Touch, Sencha.io, and Facebook Integration@

http://www.sencha.com/blog/build-a-to-do-application-with-sencha-touch-senchaio-and-facebook/
add io to the application’s config:


config: { io: { appId: "5ZarPd0Cu6XyZC15AVHTE1BXq6C", appSecret: "xlK93iMvE8nsYEfk" } },