[zzo38computer]

> How I want the thing to be, "oh, the contacts permission is given but nothing here. Oh well. ". Same for location and SMS and other stuff.

Yes, that is a good idea. The user could also program in more elaborate filters, e.g. to expose a subset of contacts data, random data instead of the actual data, spoofed locations, etc. Also can be distinguish read-only or read/write, etc. (If the user does not have all of these elaborate options and more, then the app writer might realize what is happening and then might program it to complain if there is nothing there. Also, such options can be helpful for testing purpose as well as for user customizability, too.)

(I don't use the cell phone, but nevertheless such thing like you mentioned can be good idea.)